Animal Tissue and Anatomy

The eardrum (tympanic membrane) is the thin, stretched membrane at the end of the ear canal that vibrates when sound waves reach it, converting sound energy into mechanical vibrations.

Ear drum sends vibration to the inner ear.

The acrosome is the part of the sperm containing proteolytic enzymes to digest the zona pellucida. It is exposed by the process of capacitation. Then, under the influence of substances released by corona radiata cells, it releases its proteolytic enzymes and penetrates the oocyte.

On the superior end of the labia minora is a small mass of erectile tissue known as the clitoris that contains many nerve endings for sensing sexual pleasure.

The tunica vaginalis is the serous covering of the testis. It is a pouch of serous membrane, derived from the processus vaginalis of the peritoneum, which in the fetus preceded the descent of the testis from the abdomen into the scrotum.

The raphe is the visible ridge between the lateral halves of the penis, found on the ventral or underside of the penis, running from the meatus (opening of the urethra) across the scrotum to the perineum (area between scrotum and anus).

It is a vestigial remnant of the Mullerian duct located on the upper pole of the testis.

These conjoin the rete testis with the initial section of the epididymis in the male reproductive system.

It is the complicated network of soft tubules located in the hilum of the testicle, which carries sperm from the seminiferous tubules to the vasa efferentia.

It is the longest portion of the human male urethra and is confined in the corpus spongiosum.

These are convoluted tubules located in front of the lower part of the spermatic cord. These tubes are lined with columnar ciliated epithelium, and are vestigial in human male reproductive system.

It is a glycoprotein membrane covering the plasma membrane of an oocyte. It is an important constitutive part of the oocyte.

These are the only ganglia, which are two large irregularly shaped masses of nerve tissue present in the upper abdomen of humans.

It is a parasympathetic ganglion found in the pterygopalatine fossa. The flow of blood to the nasal mucosa is regulated by the pterygopalatine ganglion which heats or cools the air in the nose.

Common bile duct is also called as ductus choledocus. It conducts both bile and pancreatic juice.