Why color of blood is red Related: Chapter Notes 1 - Chapter 11: Transportation in Animals and Plants, Class 7, Science

Question

Why color of blood is red Related:  Chapter Notes 1 - Chapter 11: Transportation in Animals and Plants, Class 7, Science

Accepted Answer

Blood is red because it is made up of cells that are red, which are called red blood cells. But, to understand why these cells are red you have to study them on a molecular level. Within the red blood cells there is a protein called hemoglobin. Each hemoglobin protein is made up subunits called hemes, which are what give blood its red color. More specifically, the hemes can bind iron molecules, and these iron molecules bind oxygen. The blood cells are red because of the interaction between iron and oxygen. (Even more specifically, it looks red because of how the chemical bonds between the iron and the oxygen reflect light.) And it's very important for blood to be able to carry oxygen because when blood flows through the lungs, the blood picks up oxygen, and the blood carries this oxygen to the rest of the body until the oxygen is all used up -- the blood then returns to the lungs to get more oxygen.

Answer

Blood is red due to haemoglobin present in it.

Answer

Due to the presence of a red pigment called haemoglobin....it has 1 atom of iron

Answer

It is because of the 'HEMOGLOBIN'.

Answer

Blood is red because if haemoglobin it binds with oxygen and transport it to all parts of the body

Answer

Due to haemoglobin

Answer

Colour of Blood is red due to the presence of haemoglobin.

Answer

Why is the color of blood red?
Blood is red due to the presence of a pigment called hemoglobin within red blood cells. Hemoglobin is a protein that contains iron and is responsible for carrying oxygen from the lungs to the tissues in the body.

Hemoglobin and oxygen transport
- Hemoglobin has a strong affinity for oxygen, binding to it in the lungs where oxygen levels are high.
- When oxygen binds to hemoglobin, it gives blood a bright red color.

Deoxygenated blood
- Deoxygenated blood, which has released oxygen to the tissues, appears darker red or even blueish in color.
- This is because the hemoglobin in deoxygenated blood has a different molecular structure that reflects light differently.

Color change in blood vessels
- The color of blood can also appear different when seen through blood vessels due to the way light interacts with the skin and vessels.
- In superficial blood vessels, blood may appear more blue or purple due to the absorption of different wavelengths of light.

Overall appearance of blood
- Despite variations in color due to oxygen levels and light reflection, the predominant color of blood remains red due to the presence of hemoglobin.
- The color red is a result of the interaction between hemoglobin and oxygen, which is essential for the transport of oxygen throughout the body.
In conclusion, the red color of blood is a crucial aspect of its function in oxygen transport and reflects the presence of hemoglobin, the pigment responsible for carrying oxygen in the bloodstream.

Similar Class 7 Doubts

Define blood vessels Related: NCERT Solution: Chapter 11 - Transportation in Animals & Plants, Class 7, Science

Needed a Document for ch11 sc? Related: NCERT Solution: Chapter 11 - Transportation in Animals & Plants, Class 7, Science

Name the various components of blood Related: Learning:Blood and its Components, Transportation in Animals and Plants, Class 7 Science

why is blood needed by all the part of a body Related: Role of the Heart in Pumping Blood, Transportation in Animals and Plants, Class 7 Science

what is blood vesel how to draw a webchart of blood vessel Related: What is the role of Blood Vessels?, Transportation in Animals and Plants, Class 7 Science

Top Courses for Class 7View all

Science Class 7

Mathematics (Maths) Class 7

Social Studies (SST) Class 7

English Grammar Class 7

Worksheets with solutions for Class 7

Top Courses for Class 7

Top Courses for Class 7

Suggested Free Tests

Related Content

Class 7 Study Material

Class 7 Subjects

Competitive Examinations for Class 7

NCERT Books

Reference Books for Class 7

NCERT Solutions

Other Popular Exams

Company