anatomy exam 2

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71 terms · heart/blood/arteries/veins

what are the functions of blood?

transportation of O2 and Co2
regulation of body temp, pH and fluid volume
protection/production of antibodies

what are the 3 factions of blood and their percentage?

1. erythrocytes 44%
2. buffy coat 1%
3. plasma 55%

what are erythrocytes characteristics?

RBC's (mature RBC's lack nuclei and other organelles)
small in size
biconcave shape

what is the red pigmented protein in erythrocytes?

hemoglobin (which reversibly transports O2 and Co2 in the blood)

what is erythropoiesis?

the process of erythrocyte production (about 3 million erythrocytes are produced per second)

what are characteristics of leukocytes?

they possess a nucleus and organelles
they are known as defenders

what are the two classes of leukocytes?

granuloctyes and argranulocytes

what are the three leukocytes-granulocytes?

neutrophils- bacteria
eosinophils-antibody
basophils-histamine

what are the two leukocytes- agranulocytes?

lymphoctyes-produce antibodies
monocytes-dead cells

what are platelets?

involved in the clotting of blood
produced by megakaryoctyes in the red bone marrow

what are Type A antibodies?

anti B antibodies

what are type B antibodies?

anti A antibodies

what are type AB antibodies?

neither anti A or anti B antibodies

what are type O antibodies?

both anti A and anti B antibodies

Which blood type is the universal donnor?

type O

which blood type is the universal recipent?

type AB

what are the two basic types of blood vessels?

arteries and veins

what are arteries?

blood vessels that carry blood away from the heart

what are veins?

blood vessels that carry blood back to the heart

the arteries and veins entering and leaving the heart are called what? and why?

great vessels; they have relatively large diameter

what are the two circulations in the cardiovascular system? and where are they located?

pulmonary ( right side of heart) and systemic (left side of heart)

what is pericardium?

the tough sac the heart is enclosed within

what are the three layers of the heart wall?

epicardium (visceral layer) , myocardium (cardiac muscle), and endocardium (internal surface of heart chambers and external surface of heart valves)

what are the four chambers of the heart?

right atrium
right ventricle
left atrium
left ventricle

what are the four valves of the heart?

tricuspid, mitral, pulmonary semilunar, and aortic semilunar

what are the three veins that drain into the right atrium?

superior vena cava, inferior vena cava, and coronary sinus

what are the three classes of blood vessels?

arteries, capillaries, and veins

what are the 3 types of arteries?

elastic, muscular and arterioles

what are the characteristics of elastic arteries?

largest of the arteries, near the heart, stretch under increased pressure by blood flow

what are the characteristics of muscular arteries?

medium diameter, thicker tunica media

what are the characteristics of arterioles?

smallest arteries, less than six cell layers of smooth muscle, causes vasoconstriction and vasodilation

what is the difference in vasoconstriction and vasodilation?

constriction: elevation of blood pressure
dilation: lowering of blood pressure

what are capillaries?

smallest of all blood vessels

what are veins?

blood vessels that drain capillaries and return blood to the heart. much lower pressure than in arteries

what are venules?

smalles veins

what is the function of a postcapillary venule?

to drain the capillary bed

what do valves in veins do?

causes venus blood flow to go in only one direction

which circuit of the cardiovascular system is responisble for sending blood to the kidneys, stomach, and pelvic regions?

systemic circulation

which circuit of the cardiovascular system is responsible for the lungs?

pulmonary circulation

Oxygenated blood is pumped out of where?

left ventricle into ascending aorta

blood is returned by way of?

inferior vena cava to the right atrium; from lower limbs, pelvis and perineum and abdominal structures

what three arteries are responsible for supplying the organs of the gastrointestinal tract?

celiac trunk, superior and inferior mesentric artery

what are the three branches off of the celiac trunk? and what do they supply?

1. left gastric (stomach and lower esophagus)
2. splenic artery (spleen and part of stomach)
3. common hepatic artery (liver, gall bladder, and portion of the stomach)

what is the main function of the respiratory system?

breathing

what is the upper respiratory tract comprised of?

nose and nasal cavities
paranasal sinuses
pharynx

what is the lower respiratory tract comprised of?

respiratory bronchioles
alveolar ducts
alveoli

what is the larynx?

aka the voice box, connects pharynx to trachea

what are the three major cartilages of the larynx?

thryoid, cricoid, and epiglottis

what is the largest cartilage?

thyroid

what is the ring shaped cartilage?

cricoid

what are characteristics of the epiglottis?

spoon-shaped, swallowing closes the opening to the larynx and prevents material from entering lower respiratory tract

the broncial tree is made up of what?

left and right primary bronchi, secondary bronchi and tertiary bronchi (off secondary bronchi)

what are bronchioles?

smooth muscle, involved in contraction and relaxation

which lung is smaller and why?

left, because the heart projects slightly to the left

what is pulmonary ventilation?

breathing

what are characteristics of the digestive system?

ingest food, transport, digest, absorb, and expel

what are the two categories of organs in the digestive system?

1. digestive organs (GI tract)
2. accessory digestive organs

what are the organs of the GI tract?

oral cavity, pharynx, esophagus, stomach, small intestine, large intestine (colon)

what are the accessory digestive organs?

teeth, tongue, salivary glands, liver, gall bladder, pancreas

what are the two types of movement involved in propulsion of food?

peristalsis: ripple-like wave of muscular contraction
segmentation: churning and mixing of material

what structuarl features are in the oral cavity?

cheeks, lips, palate, tongue, salivary glands, teeth

what is the lingual frenulum?

what attaches the tongue to the floor of the oral cavity

what are the functions of saliva?

moisten, chemical digestion, antibacterial action, dissolve material

what organ is shared by both the respiratory and digestive systems?

pharynx

what are the two types of peritoneum?

parietal (lines insode of body wall)
visceral (within cavity)

what are the three arteries that supply the abdominal GI tract?

celiac trunk, superior and inferior mesentric artery

what are the four regions of the stomach?

caridac, fundus, body, pyloric

what is the function of the small intestine?

absorb most of the nutrients

what are the three specific segments of the small intestine?

duodenum, jejunum, ileum

what are the structures of the large intestine?

cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, and anal canal

what are the accessory digestive organs?

liver, gall bladder, pancreas, biliary apparatus

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