and are ureotelic animal • Rats are homeothermic and viviparous. . COLUMNAR EPITHELIUM Pinna Eye Tail Whiskers Hair Identification: The specimen kept for identification is the Rat . It belongs to the Phylum Chordata, Subphylum Vertebrata and Class Mammalia .
II. Identify the given animal tissue ‘B’ (slide/photograph/picture) and give any comments with diagram. . SQUAMOUS EPITHELIUM Identification The given slide/ picture is identified as squamous epithelium.
Nuclei Cell membrane Comments: • Squamous epithelium is a type of simple epithelium • It is made of a single thin layer of flattened cells with irregular boundaries. • Found in cheek, kidney glomeruli, air sacs of lungs, lining of heart and blood vessels. • It is involved in diffusion and filtration. Identification: The given slide/ picture is identified as colum- nar epithelium .
Cell membrane Nucleus Basement XI Std Biology-Zoology Glossary Comments: • Columnar epithelium is a type of simple epithelium. • It is composed of a single layer of tall cells with round oval nuclei at the base. • It lines the digestive tract from the stomach to rectum. • It is involved in absorption, secretion of mucus, enzymes and other substances.
. RBC Identification: The given slide is identified as Red blood corpuscles (Erythrocytes). 7RSYLHZ 6LGHYLHZ FXW Comments: • The red colour of the RBC is due to the presence of a respiratory pigment, haemoglobin. • Haemoglobin plays an important role in the transport of respiratory gases.
• RBC’s are produced in the red bone marrow of large bones and are destroyed in the spleen and liver. • The average life span of an RBC in a healthy individual is about days. . WBC Identification: The given slide is identified as white blood corpuscles (leucocytes).
Eosinophils Basophils Neutrophils Monocytes Lymphocytes Comments: • Leucocytes are colourless, amoeboid, nucleated cells devoid of haemoglobin and other pigments. • Based on the presence (or) absence of granules, WBC’s are divided into two types, granulocytes (Neutrophil, Basophil and Eosinophil) and agranulocytes (Lymphocyte and Monocyte). • WBCs are involved in protecting the body against pathogens. • The life span