Welcome to Mrs. Glaser’s Agriculture Class Subject: ALS Season 1; Episode 1

Lesson Information Audience: YOU (ALS Students) Environment: Classroom/ Computer Lab/ Home Objectives: 1.Students will be able to identify the steps of an organ system from system to cell given all the steps with 100% accuracy. 2.Students will be able to identify different cattle breeds given pictures of cattle with 100% accuracy. 3.Students will be able to identify what cattle are used for and other animals that are used for the same things.

Ok, this button takes us to the next page. Click it and we will learn a bit more about how to travel through this lesson. Hi, students! This lesson has some interesting features and ways to travel through this lesson. Let’s learn a little about that.

The button that just appeared Is the back button. Did you miss something on the last slide that you want to review. No problem, just click that button. The button that just appeared is the home button. When you click it, you will go to the slide entitles “Home” After you see this button, hit the space bar as if you are advancing the slide on a normal PowerPoint. Great job! Now that we know about that button. Let’s add a new button to the mix! Use the space bar, as you would if you were changing slides on a normal PowerPoint. Click this button to move on!

Navigation Button Review This is the back button. It takes you to the last viewed slide. This is the home button. It takes you to the upcoming slide with the title “Home.” This is the next button. It takes you to the next slide.

Now that we know how to navigate the lesson, let’s move on.

We are going to learn about cows this lesson! What are you excited to learn about? Type your answer in the white box below.

I am so excited that you are interested in these animals.

The first part of this lesson is going to be about some basic biology.

Organ Systems! An organ system is the largest organitizational group of a cell. We are going to look at the cow’s digestive system as an example.

Organ System HOME This is a picture of the cow’s digestive system. Let’s break the picture down. Click on the dots to look at a singular area in more detail. After you have viewed both dots, click the next arrow.

First Stages of Digestion Cows belong to a class of animals called ruminants. This simply means that it makes a while for digestion and that they have a specific way of digesting food.

First Stages of Digestion Cows chew food to break it into smaller pieces and it is mixed with enzymes in the mouth and esophagus as it heads to the rumen.

First Stages of Digestion The next stage of digestion happens in the rumen. In the rumen, microbes and enzymes break down the food. The digesting food roams freely in the rumen.

First Stages of Digestion In the omasum, a certain amount of water is resorbed after leaving the rumen. The next step is into the absomasum, or the stomach. This is where all of the breaking down of the nutrients and absorbing them happens.

Final Stages of Digestion After the stomach, the food that is being digested moves on to the small intestine, last intestine, and cecum where the last nutrients are absorbed and the water is taken out and the indigestible material is excreted.

After the organ system on the scale of life the organ is next. We are going to look at one individual organ of the system we have previously looked at.

The large intestine is just one of the organs in the cow’s digestive system. Can you name another one? Organ A B C Rumen Lungs Heart

GREAT JOB! We can move on to the next thing on the scale of life!

Not quite… that organ is important to the cow, but not his digestive system. Let’s try again.

The next thing on the scale of life is a tissue! Let’s move on and learn a little about the tissue in animals!

There are multiple tissues that make up one organ, however; we are not going to go into any detail about tissues. Just know that they exist and that their main job is to make up organs, connect organs, or generally ass more to systems. Tissue

OK, the next stage of life is the cell. We are going to learn quite a bit about the cell!

There are two fundamental different kinds of cells. Below are 3 examples of this. Cells HOME Here are an animal cell, a plant cell, and a bacterial cell. Click each for more information. Click the arrow after you have investigated all three.

Bacterial Cell Bacterial Cells have a few thing that make them different from other cells. They are prokaryotic, which means that they do not have a membrane bound nucleus, they have a wall made of peptidoglycan they also have a flagella to help them move. Flagella No Nucleus Cell Wall

Animal Cell Animal cells are what are in cows! They do not have a cell wall but they have a membrane bound nucleus! No cell wall. Nucleus.

Plant Cell Plant cells are similar cells to animal cells in the fact that they have a nucleus. They also have a cell wall made out of cellulose and plasmodesmata, which allow transport between cells. They also have various specilized organs. Vacuole (specilized organelle) Chloroplasts Cell Wall Nucleus

Let’s review a little about what we have just learned.

This type of cell has a cell wall made of cellulose. Review 1- Question 1 A B C Animal Bacterial Plant

Great Job! Let’s do one more question then we will move a bit about cows.

No, that isn’t it… lets go back and explore the cells a bit more.

Great Job! Let’s do one more question then we will move a bit about cows.

This is the only cell type that wee discussed that does not have a nucleus. Review 1- Question 2 A B C Animal Bacterial Plant

No, that isn’t it… lets go back and explore the cells a bit more.

Great Job! Let’s move on and learn a bit more about cows.

The next part of this lesson more about cows themselves. What makes a cow different from every other animal?

Cows are domesticated, meaning that they have co-evolved overtime to fit the needs of humans.

What makes cows different form all other domesticated animals?

Cows are used to produce milk and meal for humans. They however are not the only animals that are used for this purpose.

Goats actually do the similar things as cows!

Let’s review that material a little bit before moving on to the next stage of the lesson.

What domestic animal serves similar functions as a cow? Review 2 A B C Golden Retriever Goat Squirrel

That was a wonderful job! Let’s move on to cattle breeds!

That isn’t the right answer, lets try it again.

Because cows are used to serve two functions for us, there are many different breeds of cattle that mostly serve one function.

We are going to move through the most popular breeds in the United States on at a time. Ready to jump in?

Here are the 6 most common breeds of cattle. Click on the dot next to the picture to learn more. Click the arrow after you have investigated all six of them. Cattle Breeds HOME

Angus Cattle This breed of cattle is primarily used for beef production. These lovely animals come in either black or brown varieties. This breed is very popular due in partly because of very clever advertising.

Hereford Cattle This breed of cattle is primarily used for beef production. There are two main varieties the “polled” or horned version and the traditional version.

Brown Swiss Cattle This breed of cattle is primarily used for dairy production, more precisely cheese production.

Guernsey Cattle This breed of cattle is primarily used for dairy production. The milk that a Guernsey gives is very rich in vitamins.

Holstein Cattle This breed of cattle is primarily used for dairy production. The milk is given is abundant and is great for drinking.

Beefmaster Cattle This breed of cattle is primarily used for beef production. This cow breed was developed in the US for the environment of Southern Texas.

Since we have learned so much about the 6 most popular cattle breeds, let’s have a small quiz to see what we have learned.

Name the breed of cattle seen here. Review 3 A B C Holstein Beefmaster Guernsey

Great Job! You do know those cows!

Actually, nope. Try that again. You are close.

Now, we are going to have our assessment. There are going to be a few main questions with many parts to each questions.

Click the correct order of things on the scale of life. Assessment BC A Organ Cell Tissue

Actually, nope. Try that again. You are close.

Great Job! Biology can be a bit hard.

Click the correct order of things on the scale of life. Assessment A BC Organ Cell Tissue 1

Great Job!

Actually, nope. Try that again. You are close.

To summarize, the scale of life is the organ, tissue, and cell.

Here comes the next question. Get ready!

True or False. Cows are the only animals that we get milk from. Assessment A B True. False.

Let’s try that again. That wasn’t quite right.

That is right. Good job.

Click on the cow breed that meets the criteria listed below. Assessment Angus Beefmaster Holstein Used for beef production, comes in two varieties; black and brown

That is right. Good job.

That isn’t quite right. Let’s try it again.

Click on the cow breed that meets the criteria listed below. Assessment Holstein Used for dairy production and the milk given is mainly used for drinking. Brown Swiss Guernsey

That isn’t quite right. Let’s try it again.

Great Job! Let’s continue.

OK, I feel as if we have learned a lot of stuff! Let’s end this lesson with an open ended question.

What have you learned from this lesson? Type your answer in the box below.

Great! I am glad that you learned something! You can escape this lesson now.