Body Coordination (Human Endocrine System)

Good morning class! Today you are going to learn a new chapter which is human endocrine system. What is endocrine system? The endocrine system is one of the systems in the body that coordinates body functions that involve chemical substances. 

Now watch this video.

Question 1: What are the hormones involved and the function of the hormones in the video? Answer in the comments below. Make sure you write down your name and class.

Next watch this video to show the way the hormone coordination acts.

This shows the main endocrine glands and their position in the body.

Today, you are going to do a powerpoint presentation in your own group. Look at the exercise below:

Practice 7.1 (In the textbook)

Prepare a powerpoint presentation that shows the main endocrine glands

Instructions:

1. Carry out this activity in groups.

2. Gather information from the Internet, reference books, magazines and articles on:

(a) position of the endocrine glands

(b) type of hormones secreted

(c) function of each hormone

3. Submit to teacher today.

References:

1. https://www.healthdirect.gov.au/endocrine-glands-and-their-hormones

2. Science KSSM Form 4 Textbook

3. Youtube video

Chapter 6: Support, Movement & Growth (Support, Growth and Stability in Plants)

Content Standard:

Support, growth and stability in plants

Learning standard:

Explain the support systems in terrestrial and aquatic plants.

Determine the age of woody plants.

Learning Activity:

Good morning class. Today we we are going to learn about support system in plants.

What is the support system in plants and why you think plants require support?

Now let us watch this video.

Video 1: Structure and function of stem

Video 2: Structure and function of root

A support system will help plants to stand vertically to obtain sunlight.

The support system ensures the leaves are exposed to sunlight to carry put photosynthesis.

Support is also needed to accommodate the plant weight and provide strength to withstand wind.

The main support for plants is the stem and root.

The plant stem - support its own weight and also the weight of leaves, flowers and fruits

The root- provides support to the plant by gripping the soil.

Question 1: Why do plants require support?

Now let us look at the support system of terrestrial and aquatic plants.

First, let us look at terrestrial plants. They can be divided into woody plants and herbaceous plants (non-woody).

Woody plants are usually big and tall.

The support system for woody plants is the hard, strong and tough woody tissue. It is built from lignin.

Non woody plants depend on stored water in the cells of the stem for support. These plants obtain their support from the turgidity of the cells. They are soft and they will wilt when they lack water. Now watch this video.

Video 3: Woody and Non-woody plants

Question 2: What are the differences between the support of woody plants and non-woody plants?

Some plants form a special structure to provide additional support, and some climb onto other support to obtain sunlight. Now let's look at the example below.

Video 3: Types of terrestrial plant roots

Question 3: State the type of roots that you watch in this video.

Next aquatic plants. They do not have woody tissue but they obtain their support from the water buoyancy force. Aquatic plants also have stems and leaves that have aerenchyma tissue. What is aerenchyma tissue? It consists of thin-walled cells and form air spaces in the aquatic plants. These buoyancy of these plants is aided by the air spaces.

Question 4: What are the differences between the support of the terrestrial and the aquatic plants?

How to determine the age of woody plants?

The most common method is to determine the growth rings that are present in the plant stem.

Now let us watch this video.

Video 5: How to determine the age of the tree

Question 5: From the video, state the method used to determine the growth rings that are present in the plant stem.

Please answer all the questions in the comments below. For examples:

Name:

Class:

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

That's all for today class. Thank you for your participation. Have a good day.