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Pinacoderm and choanoderm are not considered true tissues because they lack the specialized cellular organization and intercellular connections characteristic of true tissues. The pinacoderm, a layer of flat cells in sponges, primarily serves as a protective outer covering, while the choanoderm consists of flagellated cells that facilitate water flow and nutrient capture. Both structures are derived from a simple cellular arrangement rather than being organized into cohesive, functional tissue types found in more complex organisms.
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Are All body tissues are considered to be soft tissue?
No, not all body tissues are considered soft tissues. Soft tissues include muscles, tendons, ligaments, skin, fat, and blood vessels. Other tissues like bones and cartilage are considered to be hard tissues.
How many cell layers make up the body of a sponge?
The body of a sponge is made up of two main cell layers: the outer protective layer called the pinacoderm and the inner digestive layer called the choanoderm. These layers are separated by a jelly-like substance called mesohyl, which contains other cell types.
Two or more tissues which cooperate as a unit is considered a what?
Two or more tissues cooperating as a unit are considered an organ. Organs are composed of different types of tissues that work together to perform specific functions within the body.
Why is skin considered to be an organ but blood is considered to be a tissue?
Skin is considered an organ because it is composed of multiple types of tissues that work together to perform specific functions, such as protection and sensation. Blood, on the other hand, is considered a tissue because it is a collection of cells suspended in a liquid matrix (plasma) that serves specific functions, like transporting oxygen and nutrients throughout the body.
Are teeth considered human tissue?
no they are net. why? because your teeth are like Glass they will chip put your gums are from a student in ?
Why are pinocoderm and choanoderm in sponges not considered as tissues?
Pinacoderm and choanoderm in sponges are not considered true tissues because they lack the level of organization and specialization found in true tissues. The pinacoderm serves as a protective outer layer, while the choanoderm consists of flagellated cells that aid in water circulation and feeding, but both layers are not composed of tightly bound cells with defined functions. Instead, they retain a more simple, cellular organization characteristic of the primitive body plan of sponges, which do not have the complex tissue structures seen in more advanced animals.
Are All body tissues are considered to be soft tissue?
No, not all body tissues are considered soft tissues. Soft tissues include muscles, tendons, ligaments, skin, fat, and blood vessels. Other tissues like bones and cartilage are considered to be hard tissues.
How many cell layers make up the body of a sponge?
The body of a sponge is made up of two main cell layers: the outer protective layer called the pinacoderm and the inner digestive layer called the choanoderm. These layers are separated by a jelly-like substance called mesohyl, which contains other cell types.
Two or more tissues which cooperate as a unit is considered a what?
Two or more tissues cooperating as a unit are considered an organ. Organs are composed of different types of tissues that work together to perform specific functions within the body.
Which organ contains root hair tissues?
Root organ contains root hair tissues
Which of these type of tissues are not considered connective tissue adipose or epithelial?
Epithelial tissues are not considered connective tissues. Epithelial tissues form linings and coverings in the body, while connective tissues provide structural support and connect different tissues and organs. Adipose tissue is a type of connective tissue that stores fat.
Why are skin hair and considered tissues?
Hair and nails are dead cells
Is a tendon considered a type of muscle?
No, a tendon is not considered a type of muscle. Tendons are tough, fibrous connective tissues that attach muscles to bones, while muscles are soft tissues that contract and relax to produce movement.
Is the tendon considered a type of muscle?
No, a tendon is not considered a type of muscle. Tendons are tough, fibrous connective tissues that attach muscles to bones, while muscles are soft tissues that contract and relax to produce movement.
Why are skin hair and bones considered tissues?
Hair and nails are dead cells
Two muscular tissues that show light and dark bands?
Skeletal and cardiac muscle tissues are both considered as striated, which means that they have light and dark bands.
How are organelles and organs different?
organelles parts of a cell organ - considered of several tissues
