ЛЕКЦИЯ № 44. Kidneys

The kidneys are retroperitoneal organs that remove urea and other waste products from the blood. In addition, they regu late the chemical composition of [...]

ЛЕКЦИЯ № 41. The act of swallowing

The act of swallowing is divided into three stages. The first stage is under voluntary control. The food which has been transformed into a soft, mass by the [...]

ЛЕКЦИЯ № 34. Nasal cavities

The anatomical structures that play a central role in the res piratory system are located in the head and neck as well as the thorax. Nasal cavities are [...]

ЛЕКЦИЯ № 32. Respiratory bronchioles

Respiratory bronchioles are areas of transition (hybrids) between the conducting and respiratory portions of the airways. In addi tion to the typical [...]

ЛЕКЦИЯ № 29. The nose

The respiratory system permits the exchange of oxygen and carbon dioxide between air and blood by providing a thin cellular membrane deep in the lung that [...]

ЛЕКЦИЯ № 23. Respiratory system

The respiratory system is structurally and functionally adapt ed for the efficient transfer of gases between the ambient air and the bloodstream as well as [...]

ЛЕКЦИЯ № 20. Veins

Veins are low-pressure vessels that have larger lumina and thinner walls than arteries. In general, veins have more collagenous connec ti-ve tissue and less [...]

ЛЕКЦИЯ № 19. Capillaries

Capillaries are thin-walled, narrow-diameter, low-pressure vessels that generally permit easy diffusion across their walls. Most capillar ies have a [...]

ЛЕКЦИЯ № 17. Hematopoietic tissue

Hematopoietic tissue is composed of reticular fibers and cells, blood vessels, and sinusoids (thin-walled blood channels). Myeloid, or blood cell-forming [...]

ЛЕКЦИЯ № 15. Blood

Blood is considered a modified type of connective tissue. Mesoder-mal in origin, it is composed of cells and cell frag ments (erythrocytes, leukocytes, [...]