2/21/19 ati teas science review - nurse cheung · 2019. 2. 24. · 2/21/19 3 ati teas science...
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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.
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ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS
THE MUSCULAR SYSTEM
The muscular system is responsible for movement in the body, such aswalking and circulating blood. Another important function of thissystem is sustaining posture and body position.
Muscles are made up of bundles called myofibrils. These elongatedcontractile threads are made of sarcomere units. Each sarcomere unitcontains long protein filaments: actin (thin filaments) and myosin (thickfilaments). These filaments slide past each other to contact and relaxthe muscles.
Photo Credit: Andrea Collo
ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS
THE MUSCULAR SYSTEMThere are three different types of muscle
• Cardiac muscle pumps blood from the heart to the entire body. Its functions are controlled by the nervous system and are involuntary.
• Smooth (visceral) muscle is found in the walls of organs, such as the stomach and intestines. These muscles help move substances through the organs. Its functions are controlled by the nervous system and is involuntary. Photo Credit: Assignment Point
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ATI TEAS SCIENCE – BODILY ORGANS AND BODILY SYSTEMS
THE MUSCULAR SYSTEM
There are three different types of muscle
• Skeletal muscle is attached to bone by tendons and provides movement to the body when the muscles pull on the bones. It functions by contracting or shortening their length and pulling one bone to another and is voluntary (you are able to control them). This is the only muscle type that is voluntary• The origin of a muscle is located on an immobile bone where the
muscle is connected.
• The attachment of the muscle to the mobile bone is called the insertion.
Photo Credit: Slide Player