What Is a Sponge Bowl?

It belongs to the group of calcareous sponges. The sponge body is bottle-shaped and has an olive-like shape. The top is a circular water outlet. The mouth has a collar composed of bone needles. It is parallel to the central axis of the body. There are many thorns (bones) on the surface of the body. The cavernous body is 7 to 10 mm high, 2 to 3 mm in diameter, the crown collar is 1 mm long, and the live sponge is yellow. The bones consist of irregularly shaped, unequal-sized mitral needles, three-spoke needles and four-spoke bone needles.

Wearing crown bowl sponge

Right!

It belongs to the group of calcareous sponges. The sponge body is bottle-shaped and olive-shaped in shape. The top is a circular water outlet. The collar is surrounded by bone needles. It is parallel to the body axis. There are many spines on the body surface (

(A) asymmetry

Sponges have various shapes, including irregular blocks, spheres, branches, and tubes!

(B) No clear tissues and organs

Sponge is a two-germ-layer (underdeveloped) animal:

The outer layer (cortex) consists of flat cells and pore cells

The middle glue layer is a layerless cell, which includes calcareous or sandy bone needles and sponge filaments: it has protoblasts, osteogenic needle cells, and sponge filament cells!

The inner layer is composed of collar cells. If the group has nutritional functions, it will digest within cells!

(Three) with a gutter

According to the type, it is divided into: 1. single groove 2. complex groove 3. double hook!