Sensory Receptors and Coordination Systems in the Human Body

Sensory Receptors and Organs

Receptors gather outside information. Exterorreceptores are sensory structures that make up the organs.

Eye

The eye is composed of 3 layers: sclera, choroid, and retina. The eyeball contains aqueous liquid and vitreous. The cornea bends light, and the lens focuses images. The retina receives inverted pictures, and fotorreceptors convert images into impulses.

Ear

The ear has 3 parts: external ear, middle ear, and inner ear. It is responsible for hearing and balance.

Touch

The skin has two layers: epidermis and dermis. It contains various receptors for pressure, cold, heat, and contact.

Nose

The nose contains mucosa and pituitary, which are responsible for olfactory receptors and heating the air.

Taste

There are 4 flavors on the surface of the tongue, and the sense of taste is related to smell.

Diseases

Various diseases affect the eyes, ears, and skin, such as glaucoma, hyperopia, myopia, astigmatism, otitis, and rhinitis.

Coordination Systems

The stimulus-receptor-effector system is controlled by the nervous system. Neurons transmit nerve impulses and are composed of the cell body and axon. The central nervous system (CNS) is responsible for monitoring the body and its activities. The sensory nervous system (SNP) transmits nerve impulses from receptors to the CNS and to the effectors. The brain and spinal cord are part of the SNP, and they regulate involuntary functions.