- 1 What is the job of the amebocyte?
- 2 What triggers a sponge to produce Gemmules?
- 3 What is the difference between the function of an amebocyte and a Choanocyte?
- 4 Which structures are found on sponges?
- 5 What are 2 Functions of Amoebocytes?
- 6 Where are Amebocytes located in a sponge?
- 7 How do Gemmules help sponges?
- 8 Can sponges change gender?
- 9 What is the function of Gemmules in sponges?
- 10 Which body type has more than one Osculum?
- 11 What do Choanocytes look like?
- 12 What are the 2 structural components to a sponge?
- 13 What are tiny needle like structures embedded within a sponge Mesohyl?
- 14 What are the three classes of sponges?
- 15 What makes up the simplest body structure of a sponge?
What is the job of the amebocyte?
The job of the amebocytes is to travel around distributing food and oxygen to the cells of the epidermis.
What triggers a sponge to produce Gemmules?
Production of gemmules is triggered by environmental factors such as decreased temperature or desiccation and involves cell aggregation of thesocytes and the laying down of the gemmule coat. Both cell division and metabolic rate increase eventually leading to germination of the gemmules and production of a new sponge.
What is the difference between the function of an amebocyte and a Choanocyte?
Amoebocytes can be found helping with digestion by serving as food delivery drivers. Choanocytes (not an amoebocyte but a different type of cell) are flagellated cells that capture and digest food in sponges. Once inside a food vacuole, amoebocytes pick up and carry the food to other cells in the sponge.
Which structures are found on sponges?
The special cells of the sponge include those that filter sea water; cells that are phagocytic (that engulf and digest food particles); those that form the external ‘skin’, breathing pores and tubes through which water enters and leaves the body; and those that secrete the mineral and organic skeletons, called spicules
What are 2 Functions of Amoebocytes?
Amoebocytes have a variety of functions: delivering nutrients from choanocytes to other cells within the sponge, giving rise to eggs for sexual reproduction (which remain in the mesohyl), delivering phagocytized sperm from choanocytes to eggs, and differentiating into more-specific cell types.
Where are Amebocytes located in a sponge?
In sponges, amebocytes, also known as archaeocytes, are cells found in the mesohyl that can transform into any of the animal’s more specialized cell types.
How do Gemmules help sponges?
How do gemmules help some freshwater sponges survive unfavorable conditions? Gemmules are food units that also have sponge cell. The units can survive harsh conditions, so if the sponge dies, a new one reforms from the food unit. while the sponge itself is sessile, the spores and gametes it releases are not.
Can sponges change gender?
Many sponges are hermaphroditic, others never change sexes in their whole life. Unlike every other animal, sponges don’t have organized gonads. Instead, sperm are produced in and float around in the sponge’s innards (called the mesohyl).
What is the function of Gemmules in sponges?
Gemmules are internal buds found in sponges and are involved in asexual reproduction. It is an asexually reproduced mass of cells, that is capable of developing into a new organism i.e., an adult sponge.
Which body type has more than one Osculum?
Leucon sponges are the most complex of the sponge body forms and also most common. These sponges have multiple dermal pores and can have more than one osculum.
What do Choanocytes look like?
Each choanocyte has a single flagellum, which looks like a whip- like structure. This structure extends from the center of the cell out towards the open cavity of the sponge. Surrounding this single flagellum is a cylindrical collar comprised of many microvilli, which are very tiny finger- like projections on cells.
What are the 2 structural components to a sponge?
Spicules: structural elements found in most sponges that provide structural support, like a skeleton. Spicules can be made of silica or calcium carbonate. Collar cell or choanacyte: these cells line the interior of the sponge.
What are tiny needle like structures embedded within a sponge Mesohyl?
The mesohyl contains embedded amoeboid cells that secrete tiny needles called spicules or protein fibers that help give the sponge its structural strength. The cell body of the choanocyte is embedded in mesohyl but protruding into the spongocoel is a mesh- like collar surrounding a single flagellum.
What are the three classes of sponges?
There are three classes within the phylum porifera: Calcerea, Desmospongia, and Hexactinellida. Sponges are divided into these classes based primarily on the composition of their spicules and skeletal fibers. Spicules are rod-shaped cellular projections that make up the skeleton of sponges.
What makes up the simplest body structure of a sponge?
The morphology of the simplest sponges takes the shape of a cylinder with a large central cavity, the spongocoel, occupying the inside of the cylinder. Water can enter into the spongocoel from numerous pores in the body wall. Water entering the spongocoel is extruded via a large, common opening called the osculum.