1.
day that most heart attacks occur
2.
carry oxygen poor blood
3.
carries oxygen rich blood
4.
double-walled membrane around the heart
5.
medial cavity of the thorax, located between the lungs, houses the heart, trachea & esophagus
6.
outermost layer of the heart
7.
heart layer that contracts
9.
receiving chambers of the heart
10.
discharging heart chambers/pumps of the heart
11.
dividing wall/separates
12.
muscular pump of the CV system
15.
listening with a stethoscope
17.
separates the chambers of the heart
