Trachea It is a thin walled flexible tube. Its lumen is kept permanently patent by means of ‘C’ shaped hyaline cartilages. The trachea is lined by pseudostratifled ciliated columnar epithelium with interspersed goblet cells resting on a basement membrane. The … Read More …

Striated Muscle It is present in muscles of the limbs and trunk. The muscle as a whole is enclosed in a connective tissue layer called epimysium. Septa extend inwards from the epimysium dividing the muscle into various fasciculi. Thus each … Read More …

The spinal cord is comprised of a central canal surrounded by grey matter. Around this grey matter is the white matter. Grey Matter – Contains bodies of nerve cells. – Has dendrites and parts of the axon. – Contains protoplasmic … Read More …

Cardiac muscle is the muscle of the heart. Cardiac muscle resembles skeletal muscle partially. It consists of short cylindrical muscle fibers, which branch and anastomose with each other. Each fiber contains a single oval centrally placed large nucleus. Some cells … Read More …

The esophagus is a muscular tube that rapidly propels the food from pharynx into the stomach. It is about 25 cms long. Its wall includes all the layers included in the general plan of G.I.T. The mucous membrane is thrown … Read More …

Large Blood Vessels Both the Aorta and Vena Cava have three layers. Tunicae intima, media, and adventitia. Aorta The Aorta is classified under elastic arteries (conducting arteries). They have (40-70) fenestrated membranes (Concentric layers of elastic membranes) at the tunica … Read More …

Cartilage is a specialized dense connective tissue. Functions: (i) It bears the weight of the body and plays an important role during the growth in length of long bones. (ii) Gives support to developing organs. (iii) Cartilage helps in withstanding … Read More …

Spleen contains large amount of lymphatic tissue which filters blood instead of lymph. The spleen is surrounded by a connective tissue capsule which in lower animals contains smooth muscle fibers and elastic fibers. The outer surface of capsule is covered … Read More …