Animal Tissue and Anatomy

If the heart is cut out from the body of a frog, it will continue beating for a long time if it is kept moist. The poikilotherm heart has a built-in pacemaker (a group of neural cells sending out regular impulses) allowing the heart to beat for hours even after the brain is no longer connected to the heart.

Option (1) is the correct answer. Lymph nodes are major sites of B, T and other immune cells.

Testis is a primary sex organ  in males as it produces gametes.

 Most busy organ is heart because it is continuously pumping blood to all the vital organs in the body to ensure their proper functioning all the time.

 Both muscular and skeletal systems protects the internal organs of the body.The muscles of the muscular system keep bones in place; they assist with movement by contracting and pulling on the bones. 

Epiglottis prevents the entry of food in wind pipe.

Tricuspid valve is present in between right atrium and right ventricle of the heart.

Tapetum is the innermost layer of the wall of pollen sac. The tapetum is nutritive in function. The tapetal cells are multinucleate and contain Ubish bodies.

House lizard is carnivorous (insectivorous) i.e. feeds upon small insects, cricket, flies etc. Grains are plant products and are not a part of house lizard's diet. 

The V shaped bone which serves as anchoring structure to the tongue is hyoid.

Coprophagus animals eat own faeces.

Tunica albugenia is the covering of testis.

Bidder’s canal is found in kidney of frog.

The type of epithelium which lines the inner surfaces of fallopian tubes, bronchioles and small bronchi is known as ciliated epithelium.

Malleus is the first bone, incus is the second and stapes is the third bone from tympanum to inner ear.