Science Worksheet (Set 16)
Topic: Circulatory System & Muscular System
Grade: VII
Q1. Answer the following questions:
a. Imagine the septum between the left and right sides of the heart has a hole. Predict how this condition might affect the circulatory system.
– The septum separates oxygenated and deoxygenated blood in the heart.
– A hole in the septum will cause mixing of oxygen-rich and oxygen-poor blood, leading to reduced oxygen supply to body tissues.
– This can result in fatigue, shortness of breath, and improper organ function.
– A hole in the septum will cause mixing of oxygen-rich and oxygen-poor blood, leading to reduced oxygen supply to body tissues.
– This can result in fatigue, shortness of breath, and improper organ function.
b. Identify the type of muscle shown in the given picture. Write any two characteristics of the given muscle.
– The given image shows cardiac muscle.
– Characteristics:
1. Involuntary and rhythmic contractions: Cardiac muscles contract on their own without conscious control.
2. Striated appearance: They have a striped (striated) texture under a microscope.
– Characteristics:
1. Involuntary and rhythmic contractions: Cardiac muscles contract on their own without conscious control.
2. Striated appearance: They have a striped (striated) texture under a microscope.