E3 lecture7 - respiration and circulation

E3 lecture7 - respiration and circulation - Circulation and...

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

View Full Document Right Arrow Icon
Circulation and Respiration Cardiovascular System Blood (volume: 5 litres, or 11 pints) - brings oxygen to cells for electron transport and production of ATP - carbon dioxide removal - brings amino acids to cells for protein synthesis - 55% plasma: - water = 92% - proteins = 8% (carries hormones, antibodies, clotting factors, ions, nutrients, wastes) - 45% “formed elements” - red blood cells = 99.9% Red Blood Cells (a.k.a. “erythrocytes”) - carry oxygen to cells; CO 2 away from cells - contain hemoglobin (250 million molecules per blood cell) - no organelles or nuclei (!) White Blood Cells (a.k.a. leukocytes) - immune role - no hemoglobin - do have nuclei and organelles Platelets – involved in clotting Three types of blood vessels: - arteries: take blood away from heart - branch into arterioles as they approach organs - veins: bring blood back to heart - venules from capillary to veins - one-way valves ensure flow toward heart - capillaries: - connect arteries and veins via capillary beds
Background image of page 1

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

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

This note was uploaded on 02/08/2011 for the course BIO 101 taught by Professor Cantwell during the Fall '08 term at University of Tennessee.

Page1 / 2

E3 lecture7 - respiration and circulation - Circulation and...

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