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The size of the human heart is __________.
The size of your fist.
The two arteries leading from the heart are __________ and __________.
The pulmonary artery and the aorta.
The two veins leading to the heart are __________ and __________.
The pulmonary veins and the vena cava.
The blood vessel that supplies blood to the heart tissues is called __________.
The cardiac artery.
The chamber of the heart where the vena cava flows into is __________.
The right atrium.
The chamber of the heart where blood from the pulmonary vein flows into is __________.
The left atrium.
The structures that stop blood from flowing the wrong way around the heart are called __________.
Valves.
The membrane that surrounds the heart is called __________.
The pericardium.
The thickness of the muscle tissue differs between the left and right __________.
Ventricles.
The left __________ is thicker than the right because it pumps blood into the body.
Ventricle.
__________ tissue is soft and elastic; it can absorb water and become softer.
Cardiac.
The right lung is slightly shorter because of its position to the __________.
Liver.
On each side of your heart inside your chest cavity are __________.
Lungs.
The appearance of the trachea is a pipe with __________ shaped rings.
C-shaped.
The parts of the trachea are __________, __________, and __________.
The bronchi, the bronchioles, and the alveoli.
The function of the cartilage rings is to __________ the trachea.
Support.
The flap that protects the trachea when you are eating is called __________.
The epiglottis.
The trachea branches off into two __________.
Bronchi.
The gas that diffuses from the air in the alveoli into the blood is __________.
Oxygen.
The gas that diffuses from the blood into the air in the alveoli is __________.
Carbon dioxide.
When someone inhales, the lungs __________.
Expand.
The parts of the lungs include __________ and __________.
The lobes and trachea.
The bronchial tree brings air from the trachea to the __________.
Alveoli.
The diaphragm is a muscular membrane found __________ the lungs.
Under.
The larynx contains the __________ cords.
Vocal.
The left inferior lobe is located on the __________ side of the body.
Left.
The right superior lobe is located on the __________ side of the body.
Right.
The trachea is the tube through which air travels from the __________ to the lungs.
Larynx.
Some functions of the skeletal system include support, protection, and __________.
Movement. (making blood cells)
The gas produced when a metal carbonate reacts with an acid is __________.
Carbon dioxide.
During inhalation, the rib cage expands and the diaphragm __________.
Contracts.
Respiration happens in the __________.
Mitochondria.
The superior vena cava carries blood to the __________.
Heart.
The aorta carries blood to the __________.
Body.
The pulmonary artery carries blood to the __________.
Lungs.
The three types of blood vessels in the circulatory system are __________, __________, and __________.
Veins, arteries, and capillaries.
Arteries carry blood away from the __________.
Heart.
Veins carry blood back towards the __________.
Heart.
Capillaries have the __________ walls.
Thinnest.
Arteries have a __________ lumen.
Small.
Veins have a __________ lumen.
Large.
The lumen is the inside space of a __________ structure.
Tubular.
The circulatory system includes the __________ and blood vessels.
Heart.
Bones become weak and brittle due to __________.
Osteoporosis.
Three calcium-rich foods that can prevent osteoporosis are __________, __________, and __________.
Milk, cheese, and kale.
The organ systems in the human body include the __________ system and the __________ system.
Skeletal system and the muscular system.
The __________ system moves fresh air into the body and removes waste gases.
Respiratory.
The __________ system breaks down food into simple nutrients.
Digestive.
The nervous system helps all parts of the body to __________ with each other.
Communicate.
Tissue is a collection of the __________ type of cell.
Same.
The function of the heart is to __________.
Pump blood throughout the body.
Blood is composed of __________, __________, and __________.
Red blood cells, white blood cells, and plasma.
Red blood cells are responsible for transporting __________.
Oxygen.
White blood cells are responsible for __________ the body.
Protecting.
Plasma is the __________ part of blood.
Liquid.
The main function of arteries is to carry blood __________ the heart.
Away from.
The main function of veins is to carry blood __________ the heart.
Towards.
Capillaries connect __________ and __________.
Arteries and veins.
The normal adult human heart rate is between __________ and __________ beats per minute.
60 and 100.
An adult's heart typically weighs between __________ and __________ ounces.
8 and 10.
The heart has __________ valves to prevent backflow of blood.
Four.
The name of the heart's pacemaker is __________.
Sinoatrial (SA) node.
The vascular system is divided into the __________ and __________ systems.
Pulmonary and systemic.
The pulmonary circulation sends blood to the __________ and back.
Lungs.
The systemic circulation sends blood to the __________ and back.
Rest of the body.
The left side of the heart is responsible for pumping blood to the __________.
Body.
The right side of the heart is responsible for pumping blood to the __________.
Lungs.
The __________ is the largest artery in the body.
Aorta.
The heart chamber that receives blood from the body is the __________.
Right atrium.
The heart chamber that pumps blood to the lungs is the __________.
Right ventricle.
The heart chamber that receives oxygenated blood from the lungs is the __________.
Left atrium.
The heart chamber that pumps oxygenated blood to the body is the __________.
Left ventricle.
The blood component that helps in clotting is __________.
Platelets.
The average human has about __________ pints of blood.
10-12.
The junctions between heart cells allow for __________ conduction of signals.
Quick.
A healthy heart typically beats about __________ times per day.
100,000.
High blood pressure is also known as __________.
Hypertension.
The __________ is a group of diseases that affect the heart's structure and function.
Cardiovascular disease.
The cardiac cycle includes __________ and __________ phases.
Systole and diastole.
During systole, the heart __________ and pumps blood out.
Contracts.
During diastole, the heart __________ and fills with blood.
Relaxes.
The pericardium has __________ layers.
Two.
The liquid in the pericardial cavity is called __________.
Pericardial fluid.
The electrical system of the heart is responsible for __________ heartbeats.
Coordinating.
The coronary arteries supply blood to the __________.
Heart muscle.
A heart murmur is caused by __________ blood flow.
Abnormal.
The __________ controls both voluntary and involuntary muscle actions.
Nervous system.
The average size of an adult heart is approximately __________ cubic centimeters.
The smallest blood vessels, where exchange occurs, are called __________.
Capillaries.
Healthy lifestyle choices can help reduce the risk of __________ disease.
Heart.