Etiqueta: Vídeos de fisiología medica

platelets

Cell fragments called platelets, or thrombocytes, make up about 2 percent of blood. Platelets stop blood loss from damaged vessels. When a blood vessel tears, platelets at the site adhere to the wall of the vessel to close the tear.…

red blood cells

The bloodstream delivers oxygen to cells and removes carbon dioxide waste through a process called internal respiration. In the lungs, oxygen is absorbed into the erythrocytes in the blood stream. These cells, commonly called red blood cells, contain gas-transporting molecules…

Bone Repair

A fractured bone bleeds. Bone repair begins, as over a period of hours blood at the fracture site clots and forms a hematoma. The healing begins as osteoclasts in the area remove dead bone tissue, while fibroblasts penetrate the area…

sound production

Phonation is the production of sound by structures in the upper respiratory tract. During exhalation, air passes from the lungs through the larynx. Muscles in the larynx can act to move the arytenoid cartilages that then move the cords. The…

nurients absortion

Mechanical and chemical digestion in the stomach results in chyme. Peristaltic waves propel chyme through the pyloric sphincter into the duodenum of the small intestine. Finger-like projections called villi line the interior wall of the small intestine. Most absorption of…

hearingt

The process of hearing involves sound waves creating mechanical motions that cause fluid in the ear to move in waves and trigger nerve impulses that the brain interprets as sound. The outer ear functions to funnel sound waves. The vibrations…

soft tissue repair

Soft tissue organs in the body repair injury through a multi-step process that begins as platelets from torn vessels work to form a mesh-like clot that prevents blood loss. Inflammation in the area occurs as tissue repair begins in the…