Circulation
Circulation refers to the movement of blood through the body, delivering essential nutrients and oxygen to cells and removing waste products. The circulatory system, composed of the heart, blood vessels, and blood, plays a crucial role in maintaining homeostasis in the body.
Components of the Circulatory System
- Heart: The muscular organ that pumps blood throughout the body.
- Blood vessels: The network of arteries, veins, and capillaries that transport blood to and from the heart.
- Blood: The fluid connective tissue that carries oxygen, nutrients, hormones, and waste products throughout the body.
Types of Circulation
There are two primary types of circulation:
- Pulmonary circulation: The circulation of blood between the heart and the lungs, where blood picks up oxygen and releases carbon dioxide.
- Systemic circulation: The circulation of blood between the heart and the rest of the body, delivering oxygen and nutrients to tissues and organs.
Functions of Circulation
The circulatory system serves several important functions:
- Transportation of oxygen, nutrients, and hormones to cells
- Removal of carbon dioxide and waste products from cells
- Regulation of body temperature and pH balance
- Protection against pathogens and foreign substances
Study Guide
To study circulation effectively, it's important to focus on the following key areas:
- Understanding the structure and function of the heart, including its chambers, valves, and the cardiac cycle.
- Learning about the different types of blood vessels, their structures, and their roles in circulation.
- Exploring the composition of blood, including its cellular components and plasma.
- Mastering the pathways of pulmonary and systemic circulation, and how oxygen and nutrients are exchanged in the body.
- Understanding the regulation of blood pressure, heart rate, and other physiological processes related to circulation.
By mastering these concepts, you will develop a comprehensive understanding of circulation and its importance in maintaining overall health and well-being.
.◂Science Worksheets and Study Guides Seventh Grade. Introduction to Plants
Study Guide
Introduction to Plants 
Worksheet/Answer key
Introduction to Plants Worksheet/Answer key
Introduction to Plants Worksheet/Answer key
Introduction to Plants Worksheet/Answer key
Introduction to Plants Vocabulary/Answer key
Introduction to Plants Vocabulary/Answer key
Introduction to Plants Vocabulary/Answer key
Introduction to Plants Vocabulary/Answer key
Introduction to Plants Vocabulary/Answer key
Introduction to Plants
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
LIFE SCIENCE
Ecosystems: Interactions, Energy, and Dynamics
Use evidence and scientific reasoning to explain how characteristic animal behaviors (e.g., building nests to protect young from cold, herding to protect young from predators, attracting mates for breeding by producing special sounds and displaying colorful plumage, transferring pollen or seeds to create conditions for seed germination and growth) and specialized plant structures (e.g., flower brightness, nectar, and odor attracting birds that transfer pollen; hard outer shells on seeds providing protection prior to germination) affect the probability of successful reproduction of both animals and plants.