Blood Cells
this blood cell is the most common throughout the body
What is a red Blood Cell
This muscular wall separates the left and right sides of the heart to prevent oxygen-rich and oxygen-poor blood from mixing
What is the Septum
Unlike most other veins, these specific veins carry highly oxygenated blood from the lungs back to the heart
What are the Pulmonary Veins
Often called the "natural pacemaker," this node initiates the electrical impulse for a heartbeat.
What is the SA Node
These biconcave cells contain hemoglobin and are responsible for transporting oxygen.
What are Red Blood Cells
what is the smallest blood cell found in the body
What is a platelet
These are the two upper chambers of the heart that receive blood from the veins.
What are the Atria
These microscopic vessels are where the actual exchange of oxygen, nutrients, and waste occurs between blood and tissues
What are the Capillaries
This term refers to the phase of the heartbeat when the heart muscle contracts and pumps blood into the arteries
What is Systole
This yellowish liquid makes up about 55% of total blood volume and carries proteins and hormones
What is Plasma
produced in the red marrow of long bones; production is controlled by erythropoetin (kidney hormone);
This is the largest artery in the human body, responsible for carrying blood from the left ventricle to the rest of the body
What is the Aorta
This is the specific circuit that carries blood between the heart and the rest of the body
What is Systemic Circulation
In a blood pressure reading of 120/80, the "80" represents this phase, where the heart is at rest and refilling
What is Diastole
This condition, often called the "silent killer," is the medical term for chronic high blood pressure.
What is Hypertension
Defends the body against pathogens and Removes toxins, waste & damaged cells
These "heart strings" are fibrous cords that connect the papillary muscles to the tricuspid and mitral valves
What are the Chordae Tendineae
Most veins contain these one-way structures to prevent the backflow of blood due to gravity.
What are Valves
This is the medical term for a heart rate that is consistently over 100 beats per minute at rest
What is Tachycardia
These small cell fragments are essential for blood clotting and wound healing
What are Platelets
What blood cell has no nucleus when mature
White Blood Cells
This double-walled sac encloses the heart, providing protection and reducing friction.
What is the Pericardium
Blood entering the right atrium from the lower half of the body travels through this large vein.
What is the Inferior Vena Cava
This recording of the heart's electrical activity is used to diagnose arrhythmias and other cardiac issues
What is an ECG or EKG
This is the clinical name for a "heart attack," which occurs when blood flow to the heart muscle is blocked
What is a Myocardial Infarction