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Penis

...  with blood. The draining of blood occurs through the superficial medial dorsal vein flowing into the great saphenous vein located in the thigh.The penis is extremely sensitive as it has many tactile sensory receptors. In fact, it is the most sensitive organ on the male human body. What is more, the glans is the most sensitive part of the penis! No wonder the penis is nearly always responding to  ...

Hand Muscles

...  active body parts. They help us accomplish different tasks, like the gross and fine motor skills. Hand dominance is in the control of the opposite hemisphere of the brain. The hand is also rich in sensory receptors; thus, making it very sensitive to tactile stimulation. To understand how a person is able to manipulate the hands, you need to study the different hand muscles responsible for the  ...

Eyeball

...  of light entering the eyes. It accomplishes the task with the aid of the smooth muscles sphincter pupillae and the dilator pupillae. Retina The retina is part of the nervous tunic. It contains the sensory receptors housing the millions of photoreceptors, the rods and the cones. It is in the retina where an image is formed. Upon inspection, you will see two important parts, the macula lutea and  ...

Spinal Cord

...  of the skull. It has two basic, yet very vital functions: It is responsible for the impulses that result in neural communication to and fro the brain, and also with the entire human body. Peripheral sensory receptors in the entire body is sent back to the brain for interpretation. The tracts which are descending then send motor impulses to the glands or the muscles to be able to respond to the  ...