Which of the following is NOT a funciton of the repsiratory system?
transport air to & from the cells & tissues throughout the body
Which of the following is a function of the respiratory system?
provide an area for gas exchange between air & circulating blood
condition gases before they reach the exchange surfaces of the lungs
defend respiratory system & other tissues agaist inhaled bacteria
Which of the following is not a type of capliiary?
All of the following are direct branches of the celiac trunk?
left gastric artery
inferior vena cavity
All of the following are direct branches of the celiac trunk EXCEPT the?
right gastric artery
Which type of vessel has a large number of smooth muscle cell layers in its tunica media as well as elastic tissue confined to an internal elastic lamina & external elastic lamina?
Which statement is true about veins?
the largest tunica in a vein is the tunica externa
Circle the correct pathway that blood flows through the upper limb arteries:
subclavian-->axillary-->brachial-->radial & ulnar
Which of the following veins typically does not drain directly into the inferior vena cava?
After birth, the umbilical vein becomes the?
round ligament of the liver
Vasa vasorum are found in the tunica _____ of a large blood vessel?
From the innermost outward, what three laters are found in the walls of both arteries & veins?
unica intima, tunica media, tunica externa
Which tunic contains circulary arranged laters of smooth muscle cells?
The areolar connective tissue of the _____ helps aanchor the blood vessel to other structures?
Blood leaving the heart enters large, extremely resilient vessel called?
A blood vessel with thin walls, a relatively WIDE lumen, numerous one-way valves, & a diameter greater than 100 micrometers is?
Which vessels have thin walls & small diameters that facilitate rapid diffusion of gases & nutrients between blood & body tissues?
Valves in veins serve to?
prevent backflow of blood in the absence of high blood pressure
Capillaries do not function independently, but rather form interconnected networks called?
A ring of smooth muscle, the precapillary sphincter, encircles the entrance to each ________?
Which of the following selections is paired correctly?
continuous capillaries; complete lining of endothelial cells
fenestrated capillaries; holes within each endothelial cell
sinusoids; found in bone marrow, the spleen & the liver
Which of the following selections is paired INCORRECTLY?
continuous capillaries; found in intestinal villi & the kidneys
Gaps in their walls & relatively large lumens, along with basement membranes that are either discontinuous or absent, allow _____ to transport materials as large as proteins or blood cells in & out of the blood very quickly
The word root fenestra most nearly means?
At rest, about 60% of the body's blood is normally held by the?
Compared with those of the system circulation, arteries of the pulmonary circulation?
have lower blood pressure
have less elastic tissue & wider lumens
carry blood that contains less oxygen
What are the three main arterial branches that emerge from the aortic arch?
brachiocephalic trunk, left common carotid artery
left subclavian artery
The internal carotid arteries do not?
Deliver blood to structures of the neck, pharynx, mandible & face
Which three arteries branch from the celiac trunk to supply digestive organs?
left gastric, splenic & common hepatic
Which pair correctly matches an artery with the organ or regionit serves?
obturator, medial thigh
Veins that drain the head,neck & upper limbs ultimately merge to form the?
superior vena cava
Which vein collects most of the blood from the lowe limbs, pelvis, perineum & abdominal strutures?
inferior vena cava
The vens of the gastrointestinal tract all merge into some part of the
The vens of the gastrointestinal tract all merge into some part of the _______?
hepatic portal system
Which artery projects from the aortic arch, extending several branches that supply the thoracic wall before changing names inferior to the diaphragm?
descending thoacic aorta
In fetus, most of the blood is shunted from the right to the left atrium through the?
Fetal blood is shunted from the pulmonary trunk to the aorta through which of the followin?
The word root, varix, as used in ''varicose,'' appropriately translates as?
Which stuctures are found only in arteries?
internal & external elastic laminae
In terms of both composition & relative position, the ______ of the heartis most similar to the _______ of vessels walls?
endocardium; tunica intima
Compared with larger arteries, smaller arteries tend to have less _______ in their walls & more ______.
elastic tissue; smooth muscle
Which type of true capillaries aer enveloped, in certain locations, by the perivascular feet of asrocytes?
The cyclical contracting & relaxing of _______ tat alters blood flow through capillary beds about 5-10 times per minute is called ______?
precapillary sphincters; vasomotion
Although both are performed by smooth muscle, _______ raises blood pressure while _______ primarily affects nutrients delievery?
Because, at rest, they hold about ______ of the body's raises blood pressur while _______ primarily affects nutrients delivery?
Which structure are called the "functional units" of the cadiovascular system?
At any given moment, which cardiovascular components contain the most blood?
the systemic veins & venules
The ______ are to the walls of large blood vessel as te coronary vessels ar to the myocardium?
Which of the following carry oxygenated blood only? (1)systemic arteries (2)sysemic veins (3)pulmonary arteries (4)pulmonary veins
The aorta & its primary branches are all _______ arteries, as is the pulmonary trunk?
Upon leaving the capillares supplied by celiac & the superior & inferior mesenteric arteries, blood flows into the?
hepatic portal system
Arrange the names given to successive portion of the vessel that continue from the braciocephalic trunk to supply the right upper limb: (1)radial artery (2)axillary artry (3)branch artery (4) subclavian artery
In the fetus, oxygenated blood returning from the placenta is shunted away from the liver by the?
At birth, the ______ replaces the hole in the interatrial septum that has the same name as a hole in the sphenoid bon of the skull?
The ductus arteriosus closes at birth, leaving a fibrous remnant, the ligamentum?
air enters by passing to the external nose
closes trachea when swallowing
vibrates to create speech
brings air into lungs
Pulmonary veins (red)?
bring oxygen rich blood to heart
Pulmonary arteries (blue)?
bring oxygen low blood to lungs
raises during inspiration
Mayor + minor calyx?
collects urine from renal pyramids
collects urine to pass to ureter
sends urine to bldder from kidney
exit for urineout of the body
swells during sexual stimulation
passage way for birth
keeps uterus closed during pregnancy
site for fertilization
causes current to move egg
passage way for sperm
contains most semen
secrets 1/3 of semen
Name the structures which contains the vocal cords?
Name the three divisons of the pharynx?
Nasopharynx, oropharynx, lartngopharynx
What makes up the respiratory membrane?
The wall of teh alveolus & the wall of the capillary
Name & state the function of the two types of cell which make up an alveolus?
Type II-secrete sufactant
What are the air-exchange chambers of the lung called?
What is the action of the diaphragm called when it contracts & a person inspires?
Name the substance which prevents alveoli from collapsing during exhalation?
What cavity are the lungs located in?
Name the structure which prevents the trachea from collapsing & keep te airway open despite pressure chnges durin breathing?
Name the laryngeal cartilage which is caled te "guardian of the airways."