What is the body structure of tadpoles? What is the development process of tadpoles?

Early tadpoles were round or oval in shape like a fish and had lateral line organs. Since there is no orifice in the mouth, no food can be ingested. Later, the eyes and nose appear one after the other. There are suction cups under the head, outer gills on both sides of the head, and a large, flattened tail.

1. The primary stage of tadpoles, early small tadpoles, with a round or oval body, resembling a fish, and a long and flat tail.

2. Grow a small hind foot, the end of the differentiation of 5 toes, the general shape has not changed, the eyes can be more flexible, and the overall shape is slightly increased. Since there is no orifice in the mouth, food cannot be ingested.

Later, the eyes and nostrils appear one after the other; There are suction cups under the head, which can be used to attach to aquatic plants. The sides of the head have external gills and have respiratory functions. There are segmented tail muscles, and the upper and lower parts of the sarcomere have membranous upper and lower tail fins that help tadpoles swim in water.

3. The hind feet are gradually elongated, with the basic shape of the frog's hind limbs, and the tail becomes more slender.

4. One forelimb grows out, differentiating into 5 toes, the mouth is slightly protruding, and the head and body can be distinguished gradually, and the tail is thinner, but the overall shape is increased.

5. Finally, all the limbs are developed, the eyes are prominent, the mouth is enlarged, and the tail can be brought or not, then it can be called a frog.

1. Tadpoles are frogs and toads.

Aquatic larvae. with salamanders.

Compared with the larvae, the body is short, ovate, the tail is wide, the mouth is small, and there are no external gills. The inner gills are covered by the operculum of the branch. The tadpole with a lighter body color, a slightly rounded body, a long tail, and a long mouth at the front of the head is a frog.

The tadpole with a black body and a shallow tail, an oval shape, a short tail, and a mouth on the ventral surface of the front of the head is a toad. The tadpoles of toads are black and have a mouth on the ventral surface of the front of the head, while the tadpoles of frogs have a lighter body color and a mouth on the front of the head. The tadpoles of toads are smaller than the size of frogs.

The tadpoles of toads are densely packed, and the tadpoles of frogs are mostly scattered.

2. Under natural conditions, the total number of eggs laid by each female frog can reach about 5,000, and the hatching rate is about 50%, while the survival rate of tadpoles is only 20% to 30%. Under captive conditions, tadpoles are generally hatched after the female frog lays eggs for 8 15 days. The body of the newly hatched tadpole is brownish-yellow, the body length is 6 8 mm, the head has a horseshoe-shaped suction cup for attachment, the mouth is located below the suction cup, the constitution is weak, the amount of activity is small, and it passes through the yolk sac.

After 3 days, exogenous nutrients can be fed to meet their nutritional needs and growth needs.

Frog) was called (tadpole) when he was a child, and (frog) when he grew up.

Animals and plants in nature have two names.

1. (Butterfly) When I was a child, my name was (Mao Mao Mu Crypto Worm), and when I grew up, I called (Butterfly) 2. (Silkworm) grew up in Xunyan Hall and called (Moth) Jujube Wither.