Biology: Samples -

Set 1, Slide 91, Cross Section, Lightfield

Stem CS

Pine
Pumpkin
Rice
Collenchyma
Parenchyma
Sclerenchyma
Sunflower
Tilia
Zea

Pumpkin stem sample has five areas where seem to be vascular bundles. These bundles are quite big compared to bundles in other plants such as zea stem, rice stem, sunflower stem, etc. The center of the stem seems to be empty. There are additional small bundles near the large bundles. The combination of collenchyma tissue and epidermis seems to be thick.

Large Vascular Bundles

Image	Data	Description
	40x	The xylem of the large vascular bundles seem to have various sizes of the holes. One hole at the center of the image has a green substance inside.
	100x	This is close-up of the same area. The cells between the holes seem to have thicker cell walls than the other cells do. Some cells seem to have a net inside of them.
	200x	The cells in the edge of the bundle seem to be squeezed together so that the size of the cells is small.

Small Vascular Bundles

Image	Data	Description
	100x	The small vascular bundles seem a lot similar to the large vascular bundles.
	400x	Some cells contain nuclei inside of them. However, one cell in the image seems to have strange object inside of it. This object seems to have rough surface.

Collenchyma

Image	Data	Description
	200x	There are a few objects that are growing out of the epidermis. These objects look similar to root hairs.
	200x	The cells in this area appear to be growing out of the epidermis. These cells are huge and form a sort of bump on the epidermis.

Touchspin Biology

Large Vascular Bundles

Small Vascular Bundles

Collenchyma