Blood fINAL - Blood Overview of Blood Circulation • Blood...

Info iconThis preview shows pages 1–36. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Blood Overview of Blood Circulation • Blood leaves the heart via arteries that branch repeatedly until they become capillaries Overview of Blood Circulation • Oxygen (O 2 ) and nutrients diffuse across capillary walls and enter tissues Overview of Blood Circulation • Carbon dioxide (CO 2 ) and wastes move from tissues into the blood Overview of Blood Circulation • Oxygen-deficient blood leaves the capillaries and flows in veins to the heart Overview of Blood Circulation • This blood flows to the lungs where it releases CO 2 and picks up O 2 Overview of Blood Circulation • The oxygen-rich blood returns to the heart Composition of Blood • Blood is the body’s only fluid tissue Composition of Blood • It is composed of liquid plasma and formed elements Composition of Blood • Formed elements include: – Erythrocytes, or red blood cells (RBCs) Composition of Blood • Formed elements include: – Leukocytes, or white blood cells (WBCs) Composition of Blood • Formed elements include: – Platelets Composition of Blood • Hematocrit – the percentage of RBCs out of the total blood volume Composition of Blood • Hematocrit – the percentage of RBCs out of the total blood volume Components of Whole Blood Withdraw blood and place in tube 1 2 Centrifuge Plasma (55% of whole blood) Formed elements Buffy coat: leukocyctes and platelets (<1% of whole blood) Erythrocytes (45% of whole blood) Physical Characteristics and Volume • Blood is a sticky, opaque fluid with a metallic taste Physical Characteristics and Volume • Color varies from scarlet (oxygen-rich) to dark red (oxygen-poor) Physical Characteristics and Volume • The pH of blood is 7.35–7.45 Physical Characteristics and Volume • Temperature is 38 ° C , slightly higher than “normal” body temperature • The average normal oral temperature is 37 ° C Physical Characteristics and Volume • Blood accounts for approximately 8% of body weight Physical Characteristics and Volume • Average volume of blood is 5–6 L for males, and 4–5 L for females Functions of Blood • Blood performs a number of functions dealing with: – Substance distribution Functions of Blood • Blood performs a number of functions dealing with: – Regulation of blood levels of particular substances Functions of Blood • Blood performs a number of functions dealing with: – Body protection Distribution • Blood transports: – Oxygen from the lungs Distribution • Blood transports: – Nutrients from the digestive tract Distribution • Blood transports: – Metabolic wastes from cells to the lungs and kidneys for elimination Distribution • Blood transports: – Hormones from endocrine glands to target organs Regulation • Blood maintains: – Appropriate body temperature by absorbing and distributing heat Regulation • Blood maintains: – Normal pH in body tissues using buffer systems Regulation • Blood maintains: – Adequate fluid volume in the circulatory system Protection • Blood prevents blood loss by: – Activating plasma proteins and platelets Protection...
View Full Document

This note was uploaded on 10/10/2011 for the course ZOO 3733 taught by Professor Sa during the Spring '07 term at University of Central Florida.

Page1 / 356

Blood fINAL - Blood Overview of Blood Circulation • Blood...

This preview shows document pages 1 - 36. Sign up to view the full document.

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