Flexor digitorum superficialis ( flexor digitorum sublimis ) is an extrinsic flexor muscle of the fingers at the proximal interphalangeal joints.

Let's start with the proximal tubule right here.

So this is our proximal convoluted membrane right here.

These are situated at the proximal end of the bone, that is the end that connects with the scapula.

If you remember, in the proximal convoluted tubule, we talked about maybe glucose and amino acids and sodium being reabsorbed.

Vygotsky introduced the notion of zone of proximal development, an innovative metaphor capable of describing the potential of human cognitive development.

Vygotsky (1978) referred to this as the Zone of Proximal Development and believed that fostering development within this zone leads to the most rapid development.

This is true regardless of what part of the nephron we're in, whether the proximal, whether the loop of Henle, or whether we're in the distal part.

So the inside, I'm going to draw it like this because the proximal tubule has these little things that stick out, sometimes referred to as a brush border.

So if we're in the distal convoluted tubule, these kind of villi, these things that stick out this is only in the proximal convoluted tubule, those brush borders.

However, unlike Piaget, he claimed that timely and sensitive intervention by adults when a child is on the edge of learning a new task (called the zone of proximal development) could help children learn new tasks.