Delve into the intricate workings of the human circulatory system with the circulatory system gizmo answers key. This comprehensive guide unravels the mysteries of the body’s vital transportation network, providing a clear understanding of its components, functions, and disorders.
From the heart’s rhythmic contractions to the intricate network of blood vessels, this resource empowers you with a profound knowledge of the circulatory system’s role in maintaining homeostasis and sustaining life.
Circulatory System Overview
The circulatory system is a network of organs and vessels that transport blood throughout the body. It consists of the heart, blood vessels, and blood.
The circulatory system has several functions:
- Transport nutrients, oxygen, and hormones to cells
- Remove waste products from cells
- Regulate body temperature
- Protect the body from infection
There are two types of circulatory systems: open and closed.
- In an open circulatory system, blood flows freely through the body cavity.
- In a closed circulatory system, blood is contained within blood vessels.
Blood Components and Functions
Blood is composed of plasma, red blood cells, white blood cells, and platelets.
- Plasma is the liquid portion of blood and contains proteins, hormones, and other substances.
- Red blood cells carry oxygen to cells.
- White blood cells fight infection.
- Platelets help to stop bleeding.
Blood volume and composition are important for maintaining homeostasis in the body.
Heart Structure and Function, Circulatory system gizmo answers key
The heart is a muscular organ that pumps blood throughout the body.
The heart has four chambers:
- Right atrium
- Right ventricle
- Left atrium
- Left ventricle
The cardiac cycle is the sequence of events that occur during each heartbeat.
- The cardiac cycle begins when the atria contract and fill the ventricles with blood.
- The ventricles then contract and pump blood out to the body.
- The heart rate is controlled by the sinoatrial node (SA node) and the atrioventricular node (AV node).
Blood Vessels: Structure and Function
Blood vessels are the tubes that carry blood throughout the body.
There are three types of blood vessels:
- Arteries carry blood away from the heart.
- Veins carry blood back to the heart.
- Capillaries are small blood vessels that connect arteries and veins.
The structure and function of blood vessels are adapted to their specific roles in the circulatory system.
Blood Pressure and Circulation
Blood pressure is the force of blood against the walls of blood vessels.
Blood pressure is measured in millimeters of mercury (mm Hg).
The factors that affect blood pressure include:
- Heart rate
- Stroke volume
- Peripheral resistance
Blood pressure is regulated by the nervous system and the endocrine system.
Circulatory System Disorders
There are many different circulatory system disorders.
Some of the most common circulatory system disorders include:
- Coronary artery disease
- Heart attack
- Stroke
- Hypertension
- Atherosclerosis
The causes, symptoms, and treatment of circulatory system disorders vary depending on the specific disorder.
FAQ Compilation: Circulatory System Gizmo Answers Key
What is the primary function of the circulatory system?
To transport oxygen, nutrients, and hormones throughout the body while removing waste products.
What are the four main components of blood?
Red blood cells, white blood cells, platelets, and plasma.
What is the role of the heart valves?
To ensure the proper flow of blood through the heart chambers.
