๐ชฑ A worm is a type of invertebrate animal that includes earthworms, roundworms, and flatworms.
๐ The anatomy of an earthworm consists of ringed segments called annuli, which are covered in tiny hairs called setae that help the worm move.
๐ฑ The worm's muscles extend and contract, using the setae as anchors, to move its body forward.
๐ The worm's platelum secretes a cocoon for its eggs and helps with orientation.
๐ The worm's anatomy is divided into anterior (head) and posterior (rear) ends, with a dorsal (back) and ventral (stomach) side.
๐ช The dissection process involves making an incision behind the clatalum and peeling away the flaps called septum to reveal the segments of the worm.
๐ช Cutting the worm reveals the cuticle, an outer protective layer.
๐ง The worm has a small brain with two lobes located near the head.
๐ก The pharynx, located at the beginning of the digestive system, functions as a suction pump.
๐ Worms have both male and female reproductive organs, with seminal vesicles producing sperm and seminal receptacles receiving sperm.
๐ Earthworms have five arch-shaped hearts called aortic arches that pump blood throughout their body.
๐ฌ๏ธ Worms breathe through their skin as they do not have lungs.
๐ฌ๏ธ Worms must stay moist in order to breathe, as air dissolves on the mucus of their skin.
๐ The aortic arches pump oxygenated blood throughout the worm's body.
๐ฝ The crop stores food until it can be moved to the gizzard, which has a thicker muscle lining to grind up the food.
๐ The intestine absorbs nutrients from the food, and waste is expelled through the anus.
๐ชฑ Earthworms are beneficial for plant growth as their droppings contain nitrogen and other nutrients.
๐ก The intestine absorbs nutrients from food and distributes them through the worm's body via blood vessels.
๐ง The worm's ventral nerve cord, connected to the brain, acts as its spinal cord, allowing it to move and respond to stimuli.
๐ฉธ The dorsal blood vessel carries blood to the front of the earthworm's body.
๐ง The ventral nerve cord and ventral blood vessel carry blood to the back of the earthworm's body.
๐ฉ Cutting open the intestine reveals digested soil in the earthworm.
50+ PRESET LIGHTROOM | PREWEDDING AESTHETIC | LIGHTROOM TUTORIAL
์ง๊ธ ์ ๋ค๋ฆฐ ์ด์ ๊ท ์ ์ฐ๊ธฐ๋ก ์์ฒญ๋ฅ ํญ์ฃผ ์ค! ๋์ด ์งฑ๋ง์ ๋จ์๊ฐ ์ต์ธํ๊ฒ ๊ต๋์์ ๊ฐ๊ฒ ๋๋ฉด ์คํ๋ ค ๊ฐ๊ฟ์ธ ์ด์ ใ ใ ใ [๋ฒ์ฉ] 5-6ํ
๐ฒ๐ฝ Mexican Independence Day for Kids | 16 September | Father Miguel Hidalgo | Twinkl
Sounds & Music | Build Your First 3D Game in Unity #8
Tengo algo que contaros...
Start & Game Over Screen | Build Your First 3D Game in Unity #10