This is my question from my paper.

Describe the physical difference between a psuedocoelomate and a coelomate. Which one allowed the animals to grow bigger, faster, and stronger and explain why?

To describe the physical difference between a pseudocoelomate and a coelomate, we first need to understand their basic structures.

A pseudocoelomate is an animal that has a fluid-filled body cavity called a pseudocoelom. The pseudocoelom is located between the mesoderm and endoderm tissue layers. Organs are suspended in the fluid-filled cavity, but they are not completely surrounded by mesoderm.

On the other hand, a coelomate is an animal that has a true body cavity known as a coelom. The coelom is entirely lined by mesoderm and surrounds the organs in the body.

Now, let's address which body structure allows animals to grow bigger, faster, and stronger.

Coelomates have several advantages over pseudocoelomates that enable them to grow larger, faster, and stronger. The presence of a true coelom provides several benefits:

1. Organ Placement and Support: The coelom provides a space for organs to be properly suspended, protected, and supported independently of the body wall. This allows for more efficient functioning and movement of the organs.

2. Muscle Attachment: Coelomates possess mesenteries, which are double-layered membranes holding the organs. These mesenteries allow for the attachment of muscles, providing more precise and controlled movement. This enables coelomates to have stronger muscles, allowing for greater strength and agility.

3. Flexibility and Expansion: A true coelom allows for expansion and contraction of the body cavity. This flexibility allows for the growth of organs and the accommodation of larger food sources. Consequently, coelomates have more space for organ growth and can acquire more energy, enabling faster growth rates.

In contrast, pseudocoelomates lack the structural advantages offered by a true coelom. Organs in a pseudocoelomate are not as efficiently supported or protected, which limits their size and functional capacity. The absence of definitive mesenteries and less precise muscle attachment also results in reduced strength and agility.

Therefore, based on these structural differences, it can be concluded that coelomates, with their well-developed coelom, are better equipped for growth, strength, and agility compared to pseudocoelomates.