Question Answer :him is the largest. gland in human body ? What are kupffer cells Livet is the laigest gland in human body.
The sinusoids of liver are lined by endothelium, which contains large phagocytic cells. These phagocytic cells are called kupffer cells or stellate cells. They can ingest and digest bacteria, foreign particles, damaged blood cells etc.
Question 7 : What are villi ? What is its function ?
Answer Villi are small finger like projection originating from the inner lining of small intestine.
Villus has a central lymphatic vessel known as lacteal. Externally, the villus is covered by a layer of columnar epithelium; which contains absorptive cells and mucus secreting goblet cells. Villi are meant for increasing surface area of absorption.
Question 8 : What are desmosomes ? What are they made up of
Answer Desmosomes are button like junction, with white cells connected to each other. They are also known as Macula adherens. Desmosomes are made of tonofibrils
Question 9: : Distinguish between a cartilage and a bone ? Answer
Cartilage
1. It is firm and flexible.
2. It is soft in nature
3. The matrix contains protein
chondrin
4. Calcium rarely present.
5. Chrondrocytes are seen either singly or in groups of 24 in lacunae
6. Chondroblast are oval and
devoid ofprocesses
7. Canaliculi absent in lacunae
8. Matrix is homogenous with the absence ofHaversian canal
9. Non vascular
10.Absence ofmarrow and
volkman's canal.
Bone
It is inflexible
It is hard, dry and amorphous. The matrix contain protein ossein.
Osetocytes are irregular giving off branching processes
Canuliculi present in lacunae
Matrix shows concentric lamellae with presence of Haversian canal
Richly vascular
Presence of bone marrow and volkman's canal.
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