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Students character with STEM logo

STEM Education concept.A student holding a magnifying glass watching the robot.

$STEM Education concept.A student holding a magnifying glass watching the robot.$

Stem education. Kids creating robots with teacher

Stem education. Kids creating robots with teacher

Stem education logo with explore the universe text and space objects

Cross section cut of a plant stem under microscope

Cross section cut of a plant stem under microscope

STEM concept. Science, technology, engineering and mathematics

STEM concept. Science, technology, engineering and mathematics

Stem education. Kids creating robots, success

Stem education. Kids creating robots, success

Scientist holding container with suspension of stem cells

Scientist holding container with suspension of stem cells

STEM Education vector outline colored horizontal banner

STEM Education vector outline colored horizontal banner

Stem education. Girl programming diy robot with laptop

Stem education. Girl programming diy robot with laptop

STEM word with Science outline icons vector illustration

STEM word with Science outline icons vector illustration

STEM education vector colorful frame with dark background

$STEM education vector colorful frame with dark background$

Fruit piano with kids. STEM education activity allow kids to play music with fruit and vegetables. Microcontroller converts keys

Fruit piano with kids. STEM education activity allow kids to play music with fruit and vegetables. Microcontroller converts keys

Copy space on STEM education background. STEM - science, technology, engineering and mathematics background

Stem cells of a lentil plant under the microscope.

Stem cells of a lentil plant under the microscope.

Isolated eggplant with stem over white background

Isolated eggplant with stem over white background.

Four fresh red tomatoes connected with stem

Four fresh red tomatoes connected with stem on white background

Brown butterfly on plant stem

Side macro view of brown winged butterfly on plant stem with green background. Side macro view of brown winged butterfly on plant stem with green background.

Green Caterpillar on Green Plant Stem

Green Caterpillar on Green Plant Stem

Ladybug on grass stem

A close up of a ladybug on a grass stem and dry oak leaves on the ground. A close up of a ladybug on a grass stem and dry oak leaves on the ground.

Yellow and Black Dragonfly on Green Stem during Daytime

Yellow and Black Dragonfly on Green Stem during Daytime

Primary xylem and phloem the herbaceous dicot stem: Helianthus

cross section: Helianthus stem magnification: 400x. cross section: Helianthus stem magnification: 400x

Gymnosperm Stem: Cork in Three Year Pinus

cross section: Pinus stem magnification: 400x During the first year of growth the cutinized epidermis is replaced by protective growth of cork rich periderm. The outer periderm consists of layers of cork cells, the phellem, which produces waterproofing suberin. Cork cells are dead at maturity. Deep to the phellem is a living layer of cork cambium or phellogen and beneath that, layers of cork parenchyma or phelloderm. Many cells in the periderm contain dark staining tannins. cross section: Pinus stem magnification: 400x During the first year of growth the cutinized epidermis is replaced by protective growth of cork rich periderm. The outer periderm consists of layers of cork cells, the phellem, which produces waterproofing suberin. Cork cells are dead at maturity. Deep to the phellem is a living layer of cork cambium or phellogen and beneath that, layers of cork parenchyma or phelloderm. Many cells in the periderm contain dark staining tannins.

Gymnosperm Stem: Medullary Rays Three Year Pinus

cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem. cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem.

Gymnosperm Stem: Resin Duct in Three Year Pinus

cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem. cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem.

Gymnosperm Stem: Epidermis and Cortex in Two Year Pinus

cross section: Pinus stem magnification: 400x During the first year of growth the cutinized epidermis is replaced by protective growth of cork rich periderm. The outer periderm consists of layers of cork cells, the phellem, which produces waterproofing suberin. Cork cells are dead at maturity. Deep to the phellem is a living layer of cork cambium or phellogen and beneath that, layers of cork parenchyma or phelloderm. Many cells in the periderm contain dark staining tannins. The cortex is divided into a thin outer hypodermis of lignified sclerenchyma cells and thicker inner cortex of thin walled parenchyma cells containing chloroplasts. Large resin ducts are surrounded by secretory parenchyma that produces resins and turpentines. Some cells enlarge into dark staining tyloses. Both endoderm and pericycle are inconspicuous. cross section: Pinus stem magnification: 400x During the first year of growth the cutinized epidermis is replaced by protective growth of cork rich periderm. The outer periderm consists of layers of cork cells, the phellem, which produces waterproofing suberin. Cork cells are dead at maturity. Deep to the phellem is a living layer of cork cambium or phellogen and beneath that, layers of cork parenchyma or phelloderm. Many cells in the periderm contain dark staining tannins. The cortex is divided into a thin outer hypodermis of lignified sclerenchyma cells and thicker inner cortex of thin walled parenchyma cells containing chloroplasts. Large resin ducts are surrounded by secretory parenchyma that produces resins and turpentines. Some cells enlarge into dark staining tyloses. Both endoderm and pericycle are inconspicuous.

Gymnosperm Stem: Three Year Pinus

cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem. cross section: Pinus stem magnification: 100x Because of the greater production of xylem, the vascular cylinder is dominated by radially arranged rays of secondary xylem interspaced with medullary rays of parenchyma cells. Conspicuous resin ducts are present throughout the xylem.

Macro Photo of a Beige and Brown Bug Larvae on Brown Stem

Macro Photo of a Beige and Brown Bug Larvae on Brown Stem

Green Stem With Dew Droplets

Green Stem With Dew Droplets

White and Black Bird on Brown Tree Stem

White and Black Bird on Brown Tree Stem

Common Blue Butterfly Perching on Green Stem in Close-up Photography

Common Blue Butterfly Perching on Green Stem in Close-up Photography

Herbaceous Dicot Stem: Parenchymatous Pith in Older Helianthus

cross section: Older stem: Helianthus common name: Sunflower magnification: 100x All vascular tissues in Helianthus are the product of primary growth. There are no signs of secondary growth (growth rings or lateral meristems) as might be seen in woody stems. The uniseriate and cutinized epidermis contains large multicellular trichomes and occasional stomata. The cortex consists of an outermost hypodermis of heavy walled collenchyma, a deeper layer of parenchyma and a deepest band of endodermis (starch sheath). Within the stele the vascular bundles are arranged in a ring and separated from each other by wide medullary rays of parenchyma cells. The collaterally arranged vascular bundles are almost entirely primary phloem and xylem. Each bundle consists of a large outer supportive cap of sclerenchyma fibers (phloem fiber cap), a deeper layer of primary phloem with well-defined sieve tubes and companion cells, and a deepest layer of primary xylem. In between the xylem and phloem, a narrow band of cambium may be seen. In some preparations, the highly lignified cells walls of xylem and mature sclerenchyma are stained red orange. These cells are dead at maturity and can also be distinguished by a heavy cell wall and absence of cytoplasm. The center of the stem is occupied by a pith of parenchyma cells that contain numerous starch storing amyloplasts. cross section: Older stem: Helianthus common name: Sunflower magnification: 100x All vascular tissues in Helianthus are the product of primary growth. There are no signs of secondary growth (growth rings or lateral meristems) as might be seen in woody stems. The uniseriate and cutinized epidermis contains large multicellular trichomes and occasional stomata. The cortex consists of an outermost hypodermis of heavy walled collenchyma, a deeper layer of parenchyma and a deepest band of endodermis (starch sheath). Within the stele the vascular bundles are arranged in a ring and separated from each other by wide medullary rays of parenchyma cells. The collaterally arranged vascular bundles are almost entirely primary phloem and xylem. Each bundle consists of a large outer supportive cap of sclerenchyma fibers (phloem fiber cap), a deeper layer of primary phloem with well-defined sieve tubes and companion cells, and a deepest layer of primary xylem. In between the xylem and phloem, a narrow band of cambium may be seen. In some preparations, the highly lignified cells walls of xylem and mature sclerenchyma are stained red orange. These cells are dead at maturity and can also be distinguished by a heavy cell wall and absence of cytoplasm. The center of the stem is occupied by a pith of parenchyma cells that contain numerous starch storing amyloplasts.

Apple red leaf fruit stem white healthy eating

Tree palm against the radiant blue sky with white clouds. On a thick stem like a fan spread palm branches. Tree palm against the radiant blue sky with white clouds. On a thick stem like a fan spread palm branches

Inventing the Future. Young technicians building a robot vehicle together with a male teacher at a stem robotics class

Young technicians building a robot vehicle together with a male teacher at a stem robotics class. Inventions and creativity for kids. Tinkering, educational activities concept. Dutch angle. Young technicians building a robot vehicle together with a male teacher at a stem robotics class. Inventions and creativity for kids. Tinkering, educational activities concept. Dutch angle

Stuffed mushrooms filled with cheese, mushroom stem and microgreen on the white plate with a glass of wine

Stuffed mushrooms filled with cheese, mushroom stem and microgreen on the white plate with a glass of wine in the restaurant

Alcoholic coctail with a flame and a splash on red background

Martini coctail glass on thin stem full of liquid with a meteorite falling in it. Martini coctail glass on thin stem full of liquid with a meteorite falling in it

A green asparagus stem against sky background.

Orange on orange

Single orange gerbera flower with stem, profiled against a light orange background. Single orange gerbera flower with stem, profiled against a light orange background

An ant on a big red poppy

Big red poppy with an ant in the garden. Herbaceous plant with long stem and large red flower. Big red poppy with an ant in the garden. Herbaceous plant with long stem and large red flower.

A danger spider setting on the stem

Wineglass with blue stem and chardonnay

Apple toping, focus on a stem

The Yellow Weevil (Lixus iridis) on a grass stem.

Fresh picked cherries still attached to their stem. Fresh picked cherries still attached to their stem

Fresh picked cherries still attached to their stem. Fresh picked cherries still attached to their stem

Pumpkin on Black

Orange pumpkin with stem on a black background. Orange pumpkin with stem on a black background

Stem on the beach - Amazon river - Brazil. Stem on the beach - Amazon river - Brazil

A stem gift rose isolated white

White small beetle sitting on stem

Pumpkin on Black

Orange pumpkin with stem on a black background. Orange pumpkin with stem on a black background

Pumpkin on Black

Orange pumpkin with stem on a black background. Orange pumpkin with stem on a black background

Pumpkin on Black

Orange pumpkin with stem on a black background. Orange pumpkin with stem on a black background

Weevil on the grass stem.

Black Sawfly on a green bent stem.

Mesh illustration of two fresh picked cherries with their stem. Mesh illustration of two fresh picked cherries with their stem

Fresh hop's cones on stem on white background

A stem roses frame on white

Ringed Stem Flower

Snail Garden snail crawling on a stem

Tomatoes on white

Fresh tomatoes with stem isolated on white background - shot in studio. Fresh tomatoes with stem isolated on white background - shot in studio

Close up of a Pumpkin stem

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