---
title: The Amazing Journeys: Transportation in Animals and Plants (Class 7 Science)
slug: class-7-science-transportation-in-animals-and-plants-1
source: https://www.swavid.com/blogs/class-7-science-transportation-in-animals-and-plants-1
---

# The Amazing Journeys: Transportation in Animals and Plants (Class 7 Science)

## Quick Answer
Animals utilize a circulatory system, comprising blood, blood vessels, and a heart, to transport essential nutrients, oxygen, hormones, and remove waste products. Plants, conversely, use a vascular system with xylem for water and minerals, and phloem for food, relying on physical processes like transpiration pull and translocation to move substances throughout their structure.

## Who This Helps
- Class 7 science students learning about biological systems.
- Educators seeking clear explanations of animal and plant transport.
- Parents assisting children with science homework.
- Anyone interested in fundamental biology concepts.

## Key Takeaways
- Animals use a circulatory system (blood, vessels, heart) for internal transport of substances.
- Blood consists of plasma, red blood cells, white blood cells, and platelets, each with specific functions.
- Arteries, veins, and capillaries form the network for blood circulation, with the heart acting as a pump.
- Plants possess a vascular system made of xylem (for water and minerals) and phloem (for food).
- Transpiration pull, driven by water evaporation from leaves, is the main force for water movement in plants.
- Phloem transports food (sugars) via translocation, moving from areas of high concentration to low.
- Roots absorb water by osmosis and minerals by active transport, aided by root hairs.

## What People Usually Ask
### How do animals transport essential substances?
Animals transport essential substances like nutrients, oxygen, and hormones, and remove waste, primarily through a circulatory system consisting of blood, blood vessels (arteries, veins, capillaries), and a pumping heart.

### What is the main function of the circulatory system in animals?
The circulatory system's main function is to deliver oxygen and nutrients to every cell, remove metabolic waste products (like carbon dioxide and urea), distribute hormones, and contribute to immune defense and temperature regulation.

### How do plants move water from roots to leaves?
Plants move water and dissolved minerals from their roots upwards to the leaves through the xylem tissue. This movement is primarily driven by transpiration pull, a suction force created by the evaporation of water from the leaves.

### How do plants distribute food throughout their body?
Plants distribute prepared food (sugars, mainly sucrose) from the leaves, where it's produced during photosynthesis, to all other parts of the plant through the phloem tissue. This process is called translocation and is driven by pressure differences.

## FAQ
### What are the main components of animal blood?
Animal blood is composed of plasma (the liquid matrix), red blood cells (for oxygen transport), white blood cells (for immune defense), and platelets (for blood clotting).

### What is the difference between arteries, veins, and capillaries?
Arteries are thick-walled vessels that carry oxygenated blood away from the heart. Veins are thinner-walled vessels with valves that carry deoxygenated blood back to the heart. Capillaries are the smallest, thinnest-walled vessels where the exchange of oxygen, nutrients, and waste occurs between blood and cells.

### How does the heart function in animal transportation?
The heart is a muscular organ that acts as a pump. Its right side receives deoxygenated blood from the body and pumps it to the lungs, while its left side receives oxygenated blood from the lungs and pumps it to the rest of the body, ensuring continuous circulation.

### What is xylem and what is its role in plants?
Xylem is a specialized plant vascular tissue responsible for transporting water and dissolved minerals from the roots upwards to the stem, branches, and leaves. It also provides structural support to the plant.

### What is phloem and what is its role in plants?
Phloem is a plant vascular tissue that transports prepared food (sugars) from the leaves, where photosynthesis occurs, to all other parts of the plant, including roots, growing points, flowers, and fruits, for energy and storage.

### What is transpiration pull?
Transpiration pull is the primary mechanism for water movement in plants. It is the suction force created when water evaporates from the leaves (transpiration), pulling a continuous column of water up through the xylem from the roots.

### How do plant roots absorb water and minerals?
Plant roots absorb water primarily through osmosis, moving from an area of higher water concentration in the soil to lower concentration within the root cells. Minerals are often absorbed by active transport, a process requiring energy to move them against their concentration gradient.