TobKem

29/08/2025

29/08/2025

30/07/2025

Living things have life.

18/06/2025

Living things have life

17/04/2025

Mitochondria are the powerhouses of the cell... and also my therapist, because they're always generating energy and getting rid of my stress!"
Yes or no

17/04/2025

Which hormone plays a crucial role in the development of female reproductive characteristics?
A) Testosterone
B) Estrogen

17/04/2025

What is the term for the fusion of male and female gametes?

A) Fertilization
B) Ovulation

16/04/2025

What is the primary function of the reproductive system?
A) To produce hormones
B) To produce offspring

16/04/2025

Which part of the female reproductive system is responsible for fertilization?

A) O***y
B) Fallopian tube

03/04/2025

What is special about elbow skin
The skin on your elbows is special in several ways:

1. *Thicker skin*: The skin on your elbows is thicker than on other parts of your body. This is because it needs to withstand friction
2. *More folds*: Elbow skin has more folds than other areas, which allows it to stretch and move when you bend or straighten your arm.
3. *Less hair*: Elbow skin typically has less hair than other parts of your body, which may be due to the constant friction and pressure.
4. *Unique structure*: The skin on your elbows has a unique structure, with a higher concentration of collagen and elastin fibers. These fibers help give the skin its strength, elasticity and flexibility.
5. *Dryness*: Elbow skin tends to be drier than other areas due to the constant bending and stretching.

Overall, the skin on your elbows is adapted to withstand the stresses and strains of daily life, making it a remarkable and resilient part of your body!

02/04/2025

The Ocean is Full of Oxygen

Did you know that over 50% of the oxygen we breathe comes from the ocean? Tiny marine plants called phytoplankton produce more oxygen than all the rainforests combined! 🌱💙

Next time you take a deep breath, thank the ocean! What’s your favorite marine organism? 🐠🐙

18/03/2025

*The Evolution of the Heart*

Did you know that the heart has been pumping for over 500 million years?

Let's take a journey through time and explore the evolution of the heart:

- *Fish (500 million years ago)*: The first hearts were simple tubes that pumped blood through fish bodies.
- *Amphibians (300 million years ago)*: Hearts developed septa, dividing the heart into separate chambers for oxygenated and deoxygenated blood.
- *Reptiles (200 million years ago)*: Hearts became more complex, with multiple chambers and a more efficient pumping system.
- *Mammals (100 million years ago)*: Hearts developed into the complex, four-chambered organs we know today.

Today, the human heart pumps over 2,000 gallons of blood daily!