Human Anatomy and Physiology

It is a small, narrow and a pyramid eyelid muscle. It is the primary muscle  used by actors while depicting the expression of suffering.

It is a small pyramidal muscle originating from the fascia of the nasal bone. It is innervated by buccal branches of the facial nerve. It draws down the eyebrows and wrinkle the nose.

This is a neural stalk connecting the neurohypophysis with the hypothalamus.

The drum-like component of the tympanic membrane is known as pars tensa.

It is the long, cylindrical part of the dog glans, which is completely distinct from the bulbar part.

It is the longest muscle in the body. It is narrow and ribbon-like in a person's body. It is attached to the lower part of the hip.

It is the smallest and shortest of the three adductor muscles originating in the superior ramus of the pubis. It is a triangular muscle in the thigh. It acts to adduct and rotates the thigh laterally and to flex the leg.

This muscle originates from the medial side of the tuberosity of calcaneus and abducts the great toe. It creates the medial margin of the sole of the foot.

This muscle originates from the ischiopubic ramus and ischial tuberosity of the femur. It rotates the femur. The ischiocondylar part of adductor magnus is an immobilize muscle by embryonic origin and action. So, it is innervated by the tibial nerve.

These are the lateral processes dilating from the intersection of the pedicle and the lamina of the vertebra. It acts as a point for muscle attachment and rib articulation.

It encircles the gray matter of spinal cord. It bears nerve processes ascending and descending the spinal cord. The white colour comes from fatty myelin sheath.

It is the space between the arachnoid and the pia mater. It accomodates the cerebrospinal fluid and spider web-like filaments.

It is a longitudinal midline fissure situated on the ventral surface of the spinal cord. The anterior spinal artery is found in this fissure.

These are delicate thread-like extensions of the dura mater below the end of the dural sac. It connects itself to the coccyx.

The spinal nerves C1 - T1  together form a branch of the nervous system called the brachial plexus. This plexus infuses the muscles of the upper extremity including, all superficial muscles of the back, the entire arm and forearm and hand for that matter.

It is a large fibre bundle, which conjoins the forebrain with the hindbrain. It accomodates axons that control voluntary movement of the body.

This ligament lies in the vertebral column. It is broader at the intervertebral discs and narrow at the vertebral bodies. It is not penetrated by the needle during spinal tap.

Frontal lobe of the cerebral cortex is affliated with reasoning, planning, parts of speech, movement, emotion and problem solving skills of an individual.

It is the portion of the cerebral hemisphers in the temporal lobe. It is needed for learning and memory and for converting short term memory into permanent memory, and for reminding, spatial relationships in the world about us.

Acetylcholine is a neurotransmitter involved with sending messages between the motor nerves and muscles. It is found in parts of the peripheral nervous system (PNS). It enhances an individual's memory and sexual arousal.

The renal plexus is made up of filaments from the celiac plexus, the aorticorenal ganglion, and the aortic plexus. It is also conjoined by the smallest splanchnic nerve.

The anterior coronary plexus is composed partly from the superficial and partly from the deep parts of the cardiac plexus. It accomodates the right coronary artery, and provides branches to the right atrium and ventricle.

Chromaffin cells are specified secretory cells, which are derived from neural crest during embryogenesis. They secrete various bioactive substances including amines, neuropeptides and proteins.

These are basophilic cells present in the anterior pituitary secreting adrenocorticotropic hormone, melanocyte-stimulating hormone and lipotropin.

Pudendal plexus is a complex structure accomodating fibers that innervate both male and female genital organs, the rectal ampoule and the anus. In males, the pudendal plexus controls the erection and ejaculation of the penis.