B3

Covering the Circulatory System

HideShow resource information
  • Created by: Sofia
  • Created on: 23-04-12 18:04

The Heart

Right side:

Deoxygenated blood from body return to heart to be pumped to the lungs.

Left side:

Oxygenated blood from the lungs enters the heart and is pumped to the body organs and tissues.

Things that effect the heart:

  • Cholesterol
  • Fat
  • Smoking
  • High Blood Pressure
  • Stress
  • Salt
  • Alcohol
  • Hereditary Symptoms
1 of 8

The Heart

(http://hearthealthywomen.org/images/news/heart_valves.jpg)

2 of 8

The Blood

In humans, the circulatory system consists of: A heart, lungs, arteries, veins and capillaries.

Plasma: Liquid that carries blood cells and other substances e.g. glucose.

Red Blood Cells: Contain haemoglobin. This binds to oxygen creating oxyhaemoglobin. The oxygen can then be released to cells.

White Blood Cells: Make antibodies to denature or engulf antigens.

Platelets: Help clotting

In every journey around the body, blood goes in and out of the heart twice=Double Circulatory System.

3 of 8

Active Transport

Active transport:

  • Moving substances against a concentration gradient through a cell membrane
  • Moving mineral ions into plant root cells
  • In the kidney and gut

(http://media.tiscali.co.uk/images/feeds/hutchinson/ency/0013n018.jpg)

4 of 8

Transport In Plants

  • Cuticle-waterproof layer
  • Upper epidermis-Support and no chlorophyll
  • Palisade mesophyll cell-Chloroplasts and photosynthesis
  • Bundle sheath cell
  • Xylem-Carries water
  • Phloem-carries glucose and food
  • Lower epidermis-Support
  • Spongy mesophyll cells-allow air to pass through
  • Guard cell-chloroplasts contain chlorphyll
  • Stoma-stomata
  • Cuticle-waterproof layer

Microvilli= small hairs on surface of main root} increase surface area

5 of 8

Kidney Transplant

Dialysis

Advantages: 

  • no need for tissue match.

Disadvantages:

  • Twice a week for life, expensive costs long term, always have to watch diet.

Kidney Transplant:

Advantages:

  • After surgery, can leave relatively normal life, lower cost of medicine

Disadvantages:

  • Need a donor, need tissue match, need surgery every 10 years.
6 of 8

Kidney continued.

A.D.H: Stands for anti diuretic hormone, pituitary gland=water reabsorbed

Concentrated blood=ADH released from pituitary gland, water reabsorbed

Dilute blood=Much less ADH released from pituitary gland, water released in urine

If your kidney fails, its because there is a build up of toxins such as urea and salt in the blood. This can cause death due to water movement in cells or poisoning from urea.

XENOTRANSPLANTATION:

Organs from other animals are used in a transplant

There is a big risk of infection, but if doctors can overcome this, it may help with the donor crisis.

7 of 8

Food production with Yeast

Yeast: A single celled organism, reproduces asexually (BUDDING.)

Yeast can respire aerobically and anaerobically.

Aerobically:

Sugar+Oxygen->Water+Carbon Dioxide+Energy

Anaerobically:

Sugar+Ethanol+Carbon Dioxide+A little energy.

8 of 8

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »