Animal Tissue and Anatomy

Fallopian tubes are about 10 cm long and begin as funnel-shaped passages next to the ovary. These have a number of finger-like projections known as fimbriae on the end near the ovary. When an egg is released by the ovary it is 'caught' by one of the fimbriae and transported along the fallopian tube to the uterus. The egg is moved along the fallopian tube by the wafting action of cilia .

The intermediate part of male urethra (membranous portion) is the shortest, the least dilatable, and with the exception of the external orifice, the narrowest part of the canal. It extends downward and forward, with a slight anterior concavity, between the apex of the prostate and the bulb of the urethra, perforating the urogenital diaphragm about 2.5 cm. below and behind the pubic symphysis.

The space of Disse (or perisinusoidal space) is a location in the liver between a hepatocyte and a sinusoid. It contains the blood plasma. Microvilli of hepatocytes extend into this space, allowing proteins and other plasma components from the sinusoids to be absorbed by the hepatocytes.

The cystic duct is the short duct that joins the gall bladder to the common bile duct. It usually lies next to the cystic artery. It is of variable length. It contains a 'spiral valve', which does not provide much resistance to the flow of bile.

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Incisors are the biting teeth in man.

The urinary bladder is the organ that collects urine excreted by the kidneys prior to disposal by urination. It is a hollow muscular and distensible (or elastic) organ, and sits on the pelvic floor. Urine enters the bladder via the ureters and exits via the urethra.

The glomerulus is a network of small blood vessels (capillaries) located within the Bowman's capsule of the nephron. It is responsible for the filtration of blood during urine formation.

The spleen is the largest organ of the lymphatic system. It acts as a filter for blood, recycling old red blood cells and storing platelets and white blood cells.

In freshwater protozoa like Amoeba, the contractile vacuole collects excess water from the cytoplasm and expels it to prevent the cell from bursting.

Wuchereria bancrofti is a human parasitic roundworm that is the major cause of lymphatic filariasis. Thus, it is found in the lymph nodes.

The vasa efferentia arise from each testis and enter the kidney to open in the Bidder's canal. It is thin and slender and is found in male frog.