Why do human don't contain Chlorophyll to make photosynthesis and They get Energy but they don't contain chloroplast like a Pallisade Mesophyll ??

Humans, along with other animals, do not possess chlorophyll or chloroplasts like plants do. This is because humans have evolved to obtain energy through a different mechanism called cellular respiration.

Photosynthesis is the process by which plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into glucose, a form of stored energy, using chlorophyll and chloroplasts. Chlorophyll is a pigment that captures light energy and drives the photosynthetic reaction.

In contrast, humans and other animals have specialized organs, such as the digestive system and respiratory system, to obtain energy. Our primary source of energy comes from the foods we consume. Through digestion, the nutrients in our food, including carbohydrates, fats, and proteins, are broken down into simpler molecules that can be used by our cells.

Once these nutrients are broken down, they enter the cellular respiration process. Cellular respiration occurs within the mitochondria of our cells. Mitochondria are specialized organelles that act as the powerhouses of the cell.

During cellular respiration, the larger molecules derived from food are further broken down and combined with oxygen to produce energy in the form of adenosine triphosphate (ATP). This process is more complex than photosynthesis and allows for the efficient release of energy from our food.

While humans do not have chlorophyll or chloroplasts, our bodies have adapted to obtain and utilize energy through other means, specifically through the process of cellular respiration.