Biologi Kelas 12: Pertumbuhan dan Perkembangan Makhluk Hidup

Egg, egg, worm, worm, worm, worm, worm Do you know why worms can turn into worms? We can also see the change in these seeds If planted, it will turn into a flowering tree and produce more seeds We also grow from the maximum fat, how can it be this pretty?

Well, the changes that happen to living creatures, both plants, animals, and humans, are because living creatures experience growth and development. This is what makes the difference between living creatures and dead things, like this lamp. From the first time it was made, this lamp was just as big as this, it wouldn't get any bigger by itself. So what does it mean by growth and development? Are they both the same?

Let's discuss! Why is this shirt so small now? Even though 5 years ago the shirt was still very loose. This means I've grown or I've experienced growth. In biology, growth is a change in the form of an increase in volume, height, and mass.

Compared to 5 years ago, my body is now higher, bigger, and my body weight is also increasing. That's why my clothes are not enough anymore. Well, this one is just right. What happens to the living creature's body when it experiences growth? When the living creature grows, the cells in its body increase. As a result, the networks and organs in its body also change to become bigger.

This change can be measured in quantitative terms. Using this measurement, for example. I can measure my arm length now to be 65 cm. It's far different compared to when I was still a baby, when my hands were still so soft. Growth in living creatures is irreversible. It means that growth will not return to the same way. It's impossible, right? You've increased your height, then it goes back to being short.

So don't ever hope to be a good baby who cleans again. Impossible! Okay, we've discussed growth. So what is development? Both of them are the same as growing up, right?

Wait a minute, if in biology these two words have different meanings, development is a process towards maturity. The difference with growth, development is measured in a qualitative way, so you can't use the meter you used earlier. You see, the newborn baby, they can't talk yet, they can only cry. But when they are 1-3 years old, they are very fluent in talking.

It means they are experiencing development, but we can't measure this change quantitatively. We only know qualitatively. What we couldn't talk about earlier, we can talk about it. Hmm, will we grow and develop continuously? Try to pay attention to your parents or brothers. We as humans have a maximum time limit to grow and develop. On average, only up to 25 years.

Generally, other living creatures are the same, they have maximum time limit to grow and develop. If we have stopped growing and developing, we can be said to be mature. In humans, the characteristics of maturity are when they have experienced a change in shape.

In males, the body is already curly and curly. In females, the body shape changes, the lungs and the lungs grow. Well, actually, in biology, the adult living creature whose reproductive system is already functioning and ready to have a baby. In humans, for example, females have already produced ovum cells marked with menstruation.

In plants, their characteristics are already flowering. In animals, their characteristics are that they can have children or eggs. Every living creature has its own characteristics. What you have to remember is that growth and development are different life processes, but both of them occur simultaneously. Try to pay attention to your classmates. Not all of them are the same, right? There must be a difference physically. Some are small,

hair, short hair, curly hair, straight hair, and many more.

You must have thought, "Why am I not like him?" This difference is caused by a lot of factors that affect growth and development. The factors can be from two sources. It can be from the internal factor that comes from within the body of the living creature itself. It can be from the external factor that comes from the surrounding environment. The internal factor is two: genes and hormones.

Have you ever seen a basketball player or a swimmer? His body is high. Is it because he's constantly exercising? Or why? I've played basketball, I've swam, the height is still this high. Well, this is because 60% to 85% of growth factors are controlled by genes.

Every person has different genes. We, who are originally from Asia, usually have a smaller body than friends from Europe. Because, well, the genes are different. The second internal factor is hormones. When you are in the growth period, there is what is called HGH or Human Growth Hormone.

This hormone will stimulate your physical growth and the amount must be just right. If it's too little, the growth is hindered and the person becomes strong. And if it's too much, the growth becomes overgrown. As a result, he becomes a rock. The cool language is GIGANTISM.

Although most of the growth and development is influenced by genes and hormones, growth and development can also be influenced by external factors around us, namely the environment. One of the factors that affects is the food we consume.

All living things need food, and that food must come from outside our body. When we were little, our mother would tell us to eat a lot of fruits, vegetables, and proteins. Healthy food, anyway. Why? Because this food is very influential to our body's growth.

For example, in a plant, light is very influential in its growth and development because they need light to make their food. If there is no light, the photosynthesis process in the leaves will stop and they will die. Okay, friends, in this video we have learned what is growth and development as well as the factors that affect it. There are internal factors and external factors.

In the next video, we will discuss more deeply about how growth and development, both in plants, animals, and humans, as well as the factors that affect it. But if you still want to review this growth and development again, you can click the timestamp below the video. See you in the next video! Bye!