Which part of the heart encases the heart in a tough outer membrane?
The membrane surrounding the heart is called the pericardium. It is a fluid sac that serves several purposes. One of the purposes of the pericardium is it contains the heart in the chest cavity. The pericardium also prevents the heart from overexpanding when the blood volume in the heart increases.
The pericardium. It is composed of two layers: the fibrous pericardium (the outer layer that is made of tough connective tissue) and the serous pericardium (the inner layer in which serous fluid provides lubrication for the heart to beat with almost no friction).
Yes. Arthropods are characterized by an exoskeleton made mostly from the tough protein chitin, also joint appendages and segmented bodies.
The pericardium is a tough double layered fibroserous sac which covers the heart. The space between the two layers of serous pericardium the pericardial cavity, is filled with serous fluid which protects the heart from any kind of external jerk or shock.
Arthropod have exoskeleton. The exoskeleton is composed of a thin, outer protein layer, the epicuticle, and a thick, inner, chitin–protein layer.
Cell Wall
I think it is the cell wall or the cell membrane
The renal capsule surrounds the kidneys. It is made of a tough connective tissue that also helps to protect them.
Dural sheath or dura matter
Periosteum is a membrane that lines the outer surface of all bones,[1] except at the joints of long bones.
The tough outer covering that lies just outside the cell membrane in a plant cell is called the cell wall. In plant cells, it is usually made up of cellulose, hemicellulose and pectin.
The stratum corneum is the tough outer layer of the skin.
Periosteum
sclera (:
Yes, the pong pong fruit does have a fibrous husk. The outer covering of the pong pong fruit consists of a thick, fibrous husk or rind, which encases the seeds and pulp inside. This husk is tough and not edible, serving to protect the seeds and provide structural support to the fruit.
pellicle
The tough outer covering of Euglena, and Paramecium is called the Pellicle