(i) Which type of epithelium forms epidermis of the skin in land vertebrates ? (ii) What is the function of its horny layers ? How such horny layers develop ?

(i) Which type of epithelium forms epidermis of the skin in land verte

1.	(i) Which type of epithelium forms epidermis of the skin in land vertebrates ? (ii) What is the function of its horny layers ? How such horny layers develop ?
Answer» (i) Keratizined stratified squamous epithlium. (ii) Its horny layers prevent loss of water and mechanical injury. In the outer few layers of stratified squamous epithelium, the cells replace their cytoplasm with a hard, water proof protein, keratin by the process called keratinization, forming layers of dead cells stratum corneum or horny layer.

Discussion

No Comment Found

Related InterviewSolutions

Which part of alimentary canal of cockroach has an outer layer of thick circular muscles and inner cuticle forming six highly chitinous plates called teeth?A. GizzardB. CropC. ProventriculusD. Both A and C
Fill in the blanks: The entire body is covered by a hard chitinous exoskeleton. In each segment, exoskeleton has hardened plates called .....a....(...b... dorsally and ....c...ventrally) that are joined to each other by a thin fexible....d....A. a-sternites, b-sclerites, c-tergites, d-arthrodial membraneB. a-sclerites, b-tergites, c-sternites, d-articular membraneC. a-tergites, b-sternites, c-sclerties, d-articular membraneD. a-sclerties, b-sternites, c-tergites, d-articular membrane
The mouth parts of cockroach areA. Piercing and sucking typeB. Biting and cutting typeC. Chewing and biting typeD. Siphoning and sponging type
Name the mouth parts of cockroach.
(a) Name the hard plates (exoskeleton) that cover the entire body of cockroach .What is their composition and functions (b) List various mouth parts of cockroach .
The digestive system of frog is made of the following parts , Arrange them in an order beginning from mouth . Mouth, oesphagus , buccal cavity , stomach , intestine , cloaca , rectum, cloacal aperture .
Assertion. Frog has osmoreceptors in its mouth. Reason. Osmoreceptors help frog in locating a mate.A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion.B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.C. If Assertion is true but the Reason is false.D. If both Assertion and Reason are false.
Carefully study the incomplete flow chart of mouth parts of cockroach. Fill in the blanks (a),(b),(c) and (d).
Spermathecae occur in Earthworm inA. 6-9 segmentsB. 6-10 segmentsC. 6-11 segmentsD. 5-8 segments
The dorsal surface and ventral surface of the body of earthworm is marked byA. A dark median mid dorsal line (dorsal blood vessel and presence of genital pores, respectivelyB. The presence of genital openings and a dark mid ventral line (ventral blood vessel), respectivelyC. A dark mid dorsal line and a dark mid ventral line, respectivelyD. None of the above

(i) Which type of epithelium forms epidermis of the skin in land vertebrates ? (ii) What is the function of its horny layers ? How such horny layers develop ?

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment