Rudimentary organs of man

Rudimentary organs of a person are those organs in the body that, with the course of evolution, ceased to function and ceased to be significant.

Blood plasma

Plasma of blood is a liquid extracellular part of the blood flow, which is about 60% of the blood. By consistency, it can be a transparent or slightly yellowish hue (due to particles of bile pigment or other organic elements), and plasma also becomes unclear as a result of the intake of fatty foods.


Blood is a kind of connective tissue. Its intercellular substance is liquid - this is blood plasma. In the blood plasma there are ("floating") its cellular elements: erythrocytes, leukocytes, as well as platelets (blood plates).

Nerve tissue

Nervous tissue is the main structural element of the nervous system - the brain and spinal cord, nerves, nerve nodes (ganglia) and nerve endings. Nervous tissue consists of nerve cells (neurocytes, or neurons) and associated with them anatomically and functionally ancillary neuroglia cells.


Muscle tissue (textus muscularis) is a group of tissues (striated, smooth, cardiac), having a different origin and structure, combined according to a functional feature - the ability to contract - to shorten. Along with the aforementioned types of muscular tissue, formed from the mesoderm (mesenchyme), the human body secrete muscular tissue of ectodermal origin - the myocytes of the iris of the eye.

Cartilage and bone tissue

The connective tissues are also cartilaginous and bone tissue, of which the skeleton of the human body is built. These tissues are called skeletal. The organs constructed from these tissues perform the functions of support, movement, protection. They are also involved in mineral metabolism.

Connective tissue

Connective tissue (textus connectivus) is a large group of tissues, including the connective tissue itself (loose and dense fibrous), tissues with special properties (reticular, fatty), liquid (blood) and skeletal (bone and cartilaginous).

Epithelial tissue

Epithelial tissue (textus epithelialis) covers the surface of the body and lining the mucous membranes, separating the body from the external environment (the cover epithelium). From the epithelial tissue, glands (glandular epithelium) are formed.