Is it true that the arteries always carry oxygenated blood and the veins always carry deoxygenated blood?

With CF patients, they lack the water layer of the mucus in the lungs, making their mucus quite concentrated and sticky. This is because they lack t...

What do you need help with exactly?

This manipulation involves either controlled pollination, genetic engineering, or both, followed by artificial selection of progeny. Plant breeding ...

Bone is densely packed with flexible collagen fibres, hardened by calcium and phosphorus. They are built to withstand great stress, but they don't a...

Many plants have impenetrable barriers, such as bark and waxy cuticles, or adaptations, such as thorns and spines, to protect them from herbivores....

The human brain is divided into three parts: the brainstem, the cerebellum, and the cerebrum. The brainstem is the posterior part of the brain which...

Usually, 9 months. But things don't always work as expected on the first try. There's an entire discussion in the mental health space about women wh...

Genes are physical structures related by physical distance and during meiosis development of the haploid cells, and the nearer two genes are on a ch...

Great question! A reflex arc diagram shows the nerve pathway followed by a reflex action. A simple example is when you touch something really hot an...

The epidermis is the outermost layer of skin and underneath that sits the dermis. The dermis is linked to the epidermis via the basement membrane wh...