2/21/19

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ATI TEAS SCIENCE REVIEW

BODILY ORGANS AND SYSTEMS

ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS

Questions related to the Bodily Organs and Systems will test yourknowledge of structures and functions within the ten human organsystems that are essential to life. You may also be tested on vocabularyterms related to your understanding of anatomy. You must understandthese vital body systems when caring for patient’s co-morbidities.

Please note that the ATI TEAS will only cover basic knowledge ofbodily organs and systems. More in-depth knowledge will be coveredin our Anatomy and Physiology Series.

Let’s get started on understanding how the bodily organs and systemsare important on the ATI TEAS.

ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS

THE CARDIOVASCULAR SYSTEM

The cardiovascular, or circulatory, system transports blood pumpedfrom the heart throughout the entire body. The blood is carriedthrough various blood vessels and contains vital nutrients, oxygen, andhormones to help maintain the body’s homeostasis.

There are three types of blood vessels that work in conjunction withthe heart to provide blood to the body. These vessels form a networkthat carries the blood pumped from the heart to the body’s tissues andback to the heart again.

• Arteries carry blood away from the heart.

• Capillaries transmit nutrients and waste products between arteriesand veins.

• Veins bring the blood back to the heart.

PHOTO CREDIT: THE BIOLOGY PLACE

ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS

THE CARDIOVASCULAR SYSTEM

The heart is the major organ relevant to the circulatory system. Itconsists of four chambers and two circulatory systems.

• In pulmonary circulation, oxygen poor blood coming from the bodyenters the heart through the right atrium and is pumped by theright ventricle to the lungs to receive oxygen.

• Blood is then pumped by the left ventricle to the left atrium andthen sent out to the body. The process of delivering oxygen-richblood to the rest of the body is called systemic circulation.

PHOTO CREDIT: HUMAN ANATOMY

ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS

THE CARDIOVASCULAR SYSTEM

The heart has its own system of blood vessels that circulates blood forits own function. This system is called the coronary system.

PHOTO CREDIT: MEDCHROME TUBE

ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS

THE CARDIOVASCULAR SYSTEM

The cardiac cycle is the process of one heart beat: the heartcontracts and blood is forced out; then it relaxes and the heart fillswith blood. The stage of contraction is called systole, and thestage of relaxation is called diastole.

PHOTO CREDIT: BERNAL STUDIO