ЛЕКЦИЯ № 31. Trachea

The trachea, a hollow cylinder supported by 16-20 cartilaginous rings, is continuous with the larynx above and the branching primary bronchi below. Mucosa of [...]

ЛЕКЦИЯ № 30. Nasopharynx and larynx

Nasopharynx is the first part of the pharynx. It is lined by a pseudostratified, ciliated, columnar. Epithelium with goblet cells: under the epithelium, a [...]

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 № 21. Heart

The heart is a muscular organ, composed primarily of cardiac muscle tissue, which contracts rhythmically to pump blood throughout the body. Structure of the [...]

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 № 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, [...]

ЛЕКЦИЯ № 11. Bones

Bone is the type of connective tissue that forms the body's supporting framework, the skeleton. In addition, bones act as levers for muscles and serve to [...]

ЛЕКЦИЯ № 10. Muscles

Muscles are the active part of the motor apparatus; their contraction produces various movements. The muscles may be divided from a physiological standpoint [...]

ЛЕКЦИЯ № 7. Skeletal system

The components of the skeletal system are derived from mesenchy-mal elements that arise from mesoderm and neural crest. Mesenchy-mal cells differentiate into [...]