Lymphatic System and Heart Disease

Do Now Please draw a Venn Diagram. One circle

should be labeled ‘Veins’ the other circle should be labeled ‘lymphatic vessels’

Compare and contrast.

Homework Due Today

Questions on page 961, 1-3

1. List the main functions of plasma, red blood cell, white blood cells and platelets.

2. Hemophilia is a genetic disorder that results from a defective protein in the clotting pathway. What do you think happens to a person with hemophilia who has a minor cut?

3. Describe the role of the lymphatic system

4. How are the functions of veins and the lymphatic vessels similar? How are they different? (Venn Diagram)

5. What are the risk factors for the three common diseases of the circulatory system?

6. Why do you think atherosclerosis may lead to hypotension?

Answers1. Plasma contains dissolved gases and salts; RBCs carry

oxygen; WBCs fight infection; platelets clot blood

2. Hemophiliacs would bleed uncontrollably

3. Collects lymph and returns it to the circulatory system, removes microorganisms from the blood, and helps absorb fats and fat soluble vitamins from the digestive tract

4. Venn Diagram

5. High fat diet, lack of exercise, being overweight, smoking, having diabetes, age, family history, gender

6. The heart exerts more pressure to push blood through stiff veins, leading to hypertension

Also Due Today… Chapter 33.2 Worksheet

Lab Questions Handout

Homework for Tomorrow

COME TO CLASS TOMORROW ON TIME

On time – 10/10 homework grade

Late – 0/10 homework grade

Plasma

90% water

10% dissolved gases, salts, nutrients, enzymes, hormones, etc.

Helps control body temperature

Albumin, globulins, and fibrinogen

Review

Red Blood Cells

Most numerous cells in blood

Transport oxygen

Get their color from iron in hemoglobin

Binds oxygen in the lungs

Produced by cells in red bone marrow

Circulate for average of 120 days

Review

White Blood Cells

Also called, leukocytes

Guard against infection

Increased levels signify a fight against serious infection

Outnumbered by RBCs 1000 to 1

Can live for years

Review

Platelets

Plasma proteins and cell fragments

Assist with the clotting of blood

Review

Lymphatic System Network of vessels, nodes and organs that

collect lymph that leaves capillaries, checks for microorganisms, and returns it to the circulatory system

There is no pump; lymph is moved via pressure created from skeletal muscles

When injury or disease blocks lymph vessels, lymph can collect in tissues, causing swelling

Lymphatic System About 500-600 lymph nodes in you body

Under jaw

Armpits

Groin

Organs of the Lymphatic System

Thymus – located beneath the sternum

Matures lymphocytes

A type of white blood cell, helps with immune system functions

Spleen – Upper right quadrant

Filters blood of microorganisms and other loose debris

Circulatory System Disease

Heart Disease

Stroke

High Blood Pressure

Heart disease is the leading killer in the United States

Heart Disease Facts (CDC)

600,000 people die of heart disease each year in the US

1 in 4

Leading cause of death in both men and women

Every year, 935,000 Americans have a heart attack

610,000 of those are ‘First timers’

Heart Disease Facts (CDC)

RACE OF ETHNIC GROUP

% OF DEATHS

African Americans 24.5

American Indians or Alaska Natives

18

Asians or Pacific Islanders 23.2

Hispanics 20.8

Whites 25.1

All 25

Risk Factors of Heart Disease

CONTROLLABLE RISK FACTORS

UNCONTROLLABLE RISK FACTORS

DIET AGE

EXERCISE FAMILY HISTORY

WEIGHT GENDER (MEN HAVE MORE)

NOT SMOKING

HIGH BLOOD PRESSURE

HIGH BLOOD CHOLESTEROL

DIABETES

Cholesterol Lipid (fat) that is part of animal cell membranes

Synthesizes hormones, bile and vitamin D

Vitamin D – cell growth and immune function

Cholesterol is in HDL and LDL

LDL – Bad cholesterol

Becomes a part of plaque

HDL – Good Cholesterol

Transports cholesterol from tissues and arteries to the liver for removal

HDL/LDL Cholesterol should be between 100 – 200

mg / dL

LDL – less than 100 mg/dL

HDL

Men – greater than 40 mg/dL

Women – greater than 50 mg/dL

PREVENTION It is much easier to prevent heart disease than cure

it

Starts when you’re young

Includes

Balanced diet

Regular Exercise

Not smoking

Exercise strengthens the heart and helps it work more efficiently

Homework for Tomorrow

COME TO CLASS TOMORROW ON TIME

On time – 10/10 homework grade

Late – 0/10 homework grade