uml - Understanding why the extends arrow points in the opposite direction - Stack Overflow

In class diagrams I typically see something like ClassA extends ClassB where the arrow head points to ClassA. Example, here. This has always confused me. Why is the arrow head not pointing to ClassB?

What is the best UML tool? - Quora

Features Num - E

navigation - What is Navigability in UML diagrams? - Stack Overflow

A discrete event model for analysis and verification of time‐constrained business processes - Boukelkoul - 2021 - Concurrency and Computation: Practice and Experience - Wiley Online Library

OOAD - Quick Guide

UML extending class associations with generalizations - Software Engineering Stack Exchange

oop - Explanation of the UML arrows - Stack Overflow

Refactoring for reuse: an empirical study Innovations in Systems and Software Engineering

uml - Use case diagram question confusion - Software Engineering Stack Exchange

Use Case Diagram Relationships Explained with Examples - Creately Blog

1. Modeling Systems - Threat Modeling [Book]