Vascular System And The Blood

Question 0

Cavity of body where lungs and heart are located

Answer 0

Thorax

Question 1

Diffusion

Answer 1

Movement of molecules from area of high concentration to an area of lower concentration

Question 2

Heart muscle

Answer 2

Cardiac muscle , different because

-it never tiers

Question 3

Lymphatic system consists of…

Answer 3

Lymph fluid
Lymph vessels—-have valves , rely on skeletal movement, to move fluid around
Lymph nodes——swellings
Lacteals

Question 4

Functions of lymphatic system

Answer 4

Fights infection by lymphocytes & antibodies
Absorbs digested lipids from the intestines
Collects tissue fluid and returns it to the blood

Question 5

Blood made of

Answer 5

Red blood cells -transports O2 around body
White blood cells -fight infection
platelets- form blood clots
Plasma

Question 6

Red blood cells

Answer 6

Biconcave discs
No nucleus or mitochondria
Filled with haemoglobin (contains iron)
Formed in bone marrow

Question 7

Heart experiment

Answer 7

External obsevations: 
wash & dry outside of heart
Rinse inside
Distinguish between front and back
Find left side and right side of it 
Find major chambers and main vessels

8 cuts made using scalpel
Vertical cut through wall of r ventricle
One perpendicular to it in order to open r ventricle
Same for r ventricle
2 circular cuts through walls of atria
Use scissors to cut through aorta and pulmonary artery , cut down to where they meet heart to find semi lunar valves
Flag labels used to label parts of heart

Locate bicuspid valve between left atrium & ventricle

Locate tricuspid valve betwee right atrium and ventricle

Use seeker to locate veins & arteries

Disinfect all equipment eg scalpel, dissecting board, seeker

Question 8

Closed circulatory system

Answer 8

Blood always remains in vessels eg in humans

Question 9

Opened circulatory system

Answer 9

Blood not always found in vessels may bathe bodies’ cavity eg cockroaches

Question 10

Humans 2 circulatory systems

Answer 10

Systematic circuit (heart,body,heart)
Pulmonary circuit (heart,lungs,heart)

Question 11

Smoking

Answer 11

Nicotine increases blood preassure
Interferes with bodies o2 intake
Hardens arteries

Question 12

Diet

Answer 12

Cholesterol causes clogging of arteries

Obesity-heart attacks & high b.p

Question 13

Excersise

Answer 13

Makes heart muscle stronger
Better o2 supply in body
Reduces blood preassure

Question 14

Pulse

Answer 14

Wave of vibrations

It is the rhythmic expansion and contraction of artery walls as blood is forced through them

Question 15

Red blood cells

Answer 15

No mitochondria
Or nucleus 
Smaller 
Decompose
Anemia
Made in red bone marrow
Habe haemoglobin, transport 02 around

Question 16

Plasma

Answer 16

90% water
Clotting proteins
Antibodies made by wbc
Called serum if without cp
Transports heat and dissolved substance

Question 17

White blood cells

Answer 17

Red bone marrow
Fight infection and pathogens
Leukemia - too much produced 
Make antibodies
Eg LYMPHOSOSITES 
 GRANOLOCITES 
MONOCYTES

Question 18

Platelets

Answer 18

Clot blood

Haemophilia

Question 19

Blood functions

Answer 19

Transport if heat
Fights against diseases
Transports o2

Question 20

Types of blood

Answer 20

ABO rhesus -/+

Question 21

Heaet beat

Answer 21

Brain-impulse-SA(pacemaker) - pulses- atria contract

Impulses-AV node-bundle of his- pukinje tissue- ventricular systole

Question 22

Systole

Answer 22

Contracting

Question 23

Diastole

Answer 23

Not contracting, relaxed

Question 24

2 circuits

Answer 24

Sytamatic

Pulmonary

Question 25

Sa node position

Answer 25

Top wall of left atrium

Question 26

Av node

Answer 26

Floor of right atrium