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what are the functions of the lymphatic system? - ANSWER ✔ - filters lymph
what constituents can leave the capillaries? - ANSWER ✔ - leucocytes
- food
- water
- oxygen
what drains into the lymphatic capillaries instead of the blood capillaries? -
ANSWER ✔ - pressure is lower here
- excess tissue fluid
- micro organisms
- foreign matter + damaged cells
how is lymph described? - ANSWER ✔ - clear
- colourless fluid
- derived from plasma
how are micro organisms destroyed? - ANSWER ✔ phagocytic monocytes and
neutrophils engulf and destroy bacteria draining them to the lymphatic capillaries.
what does an obstruction in tissue fluid cause? - ANSWER ✔ oedema
what is tissue fluid? - ANSWER ✔ As blood passes through the blood capillaries
some of the fluid oozes out through the capillary walls and bathes the tissues
what do lymphatic capillaries eventually form? - ANSWER ✔ they unite to form
lymphatic vessels collecting excess tissue fluid.
,how are lymphatic capillaries described? - ANSWER ✔ - thin permeable walls
- orientate as minute blind end tubes
- drain away excess tissue fluid
how are lymphatic vessels described? - ANSWER ✔ - one way valves directing
lymph to the heart
- knotted or beaded appearance
- drain into the nodes
what type of circulation is the lymphatic system? - ANSWER ✔ subsidiary
what are the lymphatic organs? - ANSWER ✔ - spleen, thymus gland, adenoids,
lymph nodes, appendix, bone
marrow and tonsils
what do lacteals do? - ANSWER ✔ found in the villi of small intestine; absorb fat -
emulsified by bile and
carried to cisterna chilli.
what disease is described as destroying the immunity of an individual? - ANSWER
✔ AIDS
what are the function of the thoracic duct? - ANSWER ✔ COLLECTS MOST
LYMPH
- via the cycsterni chilli
- to left subclavian vein
Whats the function of the right lymphatic duct? - ANSWER ✔ COLLECTS LESS
LYMPH
- via the right subclavian vein
how is the spleen described? - ANSWER ✔ dark purple oblong shape that has a
phagocytic action.left side under the stomach.
-B+B
- forms phagocytes
- stores iron for haemoglobin
,how is the thymus described? - ANSWER ✔ triangular tissue against the trachea.
- atrophies after puberty
what does not contain lymphoid tissue in this system? - ANSWER ✔ the larynx
what are the lymph nodes of the face? - ANSWER ✔ preaurricular - cheek
bone\ear
paratoid + tonsular - by jaw/ear
submental and submandibular - under chin
cervical - neck
supra clavicle - polar bone
what are the lymph nodes of the body? - ANSWER ✔ auxiliary - armpit
supatrochlera - elbow
inguinal - by hips
femoral - femoral triangle
popliteal - knee
average heartbeat for a healthy adult: - ANSWER ✔ 70 beats per minute
blood is a special kind of: - ANSWER ✔ connective tissue
which component of blood transports oxygen? - ANSWER ✔ erythrocytes
function of thrombocytes? - ANSWER ✔ blood clotting
cells responsible for defence - ANSWER ✔ white blood cells
How does deoxygenated blood enter the heart? - ANSWER ✔ Enters via the vena
cava into the right atrium to the right ventricle.
the function of the pulmonary veins - ANSWER ✔ carry oxygenated blood from
the lungs to the left atrium
blood is prevented from causing a back flow by the - ANSWER ✔ valves
what chamber of the heart pumps blood to the lungs? - ANSWER ✔ the right
ventricle
, the name given to the dividsion of circulatory system which takes blood to and
from the lungs is the? - ANSWER ✔ pulmonary circulation
the percentage of water in blood plasma - ANSWER ✔ 90 percent
the normal temperature of the human body - ANSWER ✔ 37 degrees
whats not present in tissue fluid? - ANSWER ✔ red blood cells and plasma
proteins.
what blood cells are biconcave and don't have a nucleus? - ANSWER ✔ red blood
cells / erythrocytes
where are blood cells formed? - ANSWER ✔ red bone marrow of bones
the blood vessel that collects blood from the digestive organs is the? - ANSWER ✔
hepatic portal vein
whats the PH of blood - ANSWER ✔ alkaline 7.4
what are leucocytes? - ANSWER ✔ - protection
- white blood cells
- develop in red bone marrow
- irregular shapes with a nuclues
what are thrombocytes? - ANSWER ✔ - produced in bone marrow
- contain mitochondria
- platelets
- blood clotting
general circulation around the body is? - ANSWER ✔ systemic circulation
what is portal circulation? - ANSWER ✔ veins from stomach/ spleen to digestive
and intestines via hepaportic vein.
what does the vagus nerve do? - ANSWER ✔ Heart is divided into 4 chambers
The Vagus nerve decreases the force and rate of heartbeat and the