We have started new website of Reference Notes where you will find Notes, Question Paper, Solution, Old is Gold, Educational Software of all level. The location is www.MeroSpark.com . We are transferring all content from here to our new site.

Detailed Study of Frog - Download Notes of Zoology | Biology Class 11

Detailed Study of Frog Class : 11
Biology | Zoology
Detailed Study of Frog
Class : 11
File Type : DOC (MS Word)
Size : 191 KB
Download
Click on "Download" to start download the file.

Inside File
Frog (Rana tigrina)
Frog lives in fresh water, moist and damp place. They are poikilothermic (cold blooded). Frog becomes active in rainy season and they breed in rainy season. In winter and summer season, they live under soil and are inactive. The winter period is called hibernation and summer period is called aestivation. During hibernation and aestivation, they utilize food stored in their body.

External features of frog 
The body is bilaterally symmetrical and dorsoventrally flattened. Skin is moist, smooth, and slippery. On the dorsal side, there is mid dorsal line running from head to tail. Ventral side is pale –yellow in colour and dorsal side is dark green with dark patch. Body is divided into head and trunk. In each eye, there are two eyelids .upper eyelid ids immovable and eyelid is movable. There is third eyelid arising from lower eyelid, which is thin and transparent called nictitating membrane. It is freely movable and protects eye from dirty water. male frog have vocal sac on either side of throat which produces croaking sound to attract female in breeding season.

Skin :- skin is moist, smooth. The outer most layer is epidermis. Below epidermis, two glands are present. Poison gland and mucous gland. Mucous gland secretes a kind of watery fluid called mucin, which keeps skin moist.

Function – skin is protecting covering of the body. Mucous gland are present on the which secrete mucin and keeps the skin moist. Poison glands are also present in the skin, which protects from enemy. Frog does not drink water but water but water is absorbed through skin.

Download the file to read more...

See This Also :
Don't forget to LIKE, SHARE and COMMENT. Please Join with us on Facebook and Google+ for daily Notes and Updates.

Posted By : On
Category : , , ,

No comments:

Post a Comment

Don't forget to Comment. If you want any Notes, Guides or Information Write on Comment Box.

Subscribe to: Post Comments (Atom)