Platelets - blood and tissues. Other proteins include alpha...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Platelets Platelets  (  thrombocytes ) are fragments of huge cells called megakaryocytes.  Megakaryocytes fragment as they pass from the bone marrow into the bloodstream.  Platelets lack a nucleus and consist of cytoplasm (with few organelles) surrounded by a  plasma membrane. Platelets adhere to damaged blood vessel walls and release  enzymes that activate  hemostasis,  the stoppage of bleeding. Plasma Plasma is the straw-colored, liquid portion of the blood. It consists of the following: Water (90 percent). Proteins (8 percent). Albumin, the most common protein, is  produced by the liver and serves to preserve osmotic pressure between 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: blood and tissues. Other proteins include alpha and beta globulins (proteins that transport lipids and metal ions), gamma globulins (antibodies), fibrinogen and prothrombin (clotting proteins), and hormones. Waste products (urea, uric acid, creatinine, bilirubin, and others). Nutrients (absorbed from the digestive tract). Electrolytes (various ions such as sodium, calcium, chloride, and bicarbonate). Respiratory gases (O 2 and CO 2 ). Serum is the liquid material remaining after blood-clotting proteins have been removed from plasma as a result of clotting....
View Full Document

Page1 / 2

Platelets - blood and tissues. Other proteins include alpha...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online